diff --git a/include/armadillo_bits/def_superlu.hpp b/include/armadillo_bits/def_superlu.hpp
index fad64761..f0da4049 100644
--- a/include/armadillo_bits/def_superlu.hpp
+++ b/include/armadillo_bits/def_superlu.hpp
@@ -27,10 +27,10 @@ extern "C"
   extern void arma_wrapper(cgssvx)(superlu::superlu_options_t*, superlu::SuperMatrix*, int*, int*, int*, char*,  float*,  float*, superlu::SuperMatrix*, superlu::SuperMatrix*, void*, int, superlu::SuperMatrix*, superlu::SuperMatrix*,  float*,  float*,  float*,  float*, superlu::GlobalLU_t*, superlu::mem_usage_t*, superlu::SuperLUStat_t*, int*);
   extern void arma_wrapper(zgssvx)(superlu::superlu_options_t*, superlu::SuperMatrix*, int*, int*, int*, char*, double*, double*, superlu::SuperMatrix*, superlu::SuperMatrix*, void*, int, superlu::SuperMatrix*, superlu::SuperMatrix*, double*, double*, double*, double*, superlu::GlobalLU_t*, superlu::mem_usage_t*, superlu::SuperLUStat_t*, int*);
   
-  extern void arma_wrapper(sgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*,  float, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
-  extern void arma_wrapper(dgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, double, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
-  extern void arma_wrapper(cgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*,  float, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
-  extern void arma_wrapper(zgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, double, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
+  extern void arma_wrapper(sgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
+  extern void arma_wrapper(dgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
+  extern void arma_wrapper(cgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
+  extern void arma_wrapper(zgstrf)(superlu::superlu_options_t*, superlu::SuperMatrix*, int, int, int*, void*, int, int*, int*, superlu::SuperMatrix*, superlu::SuperMatrix*, superlu::GlobalLU_t*, superlu::SuperLUStat_t*, int*);
   
   extern void arma_wrapper(sgstrs)(superlu::trans_t, superlu::SuperMatrix*, superlu::SuperMatrix*, int*, int*, superlu::SuperMatrix*, superlu::SuperLUStat_t*, int*);
   extern void arma_wrapper(dgstrs)(superlu::trans_t, superlu::SuperMatrix*, superlu::SuperMatrix*, int*, int*, superlu::SuperMatrix*, superlu::SuperLUStat_t*, int*);
diff --git a/include/armadillo_bits/newarp_SparseGenRealShiftSolve_meat.hpp b/include/armadillo_bits/newarp_SparseGenRealShiftSolve_meat.hpp
index 07397391..b07e7914 100644
--- a/include/armadillo_bits/newarp_SparseGenRealShiftSolve_meat.hpp
+++ b/include/armadillo_bits/newarp_SparseGenRealShiftSolve_meat.hpp
@@ -51,7 +51,6 @@ SparseGenRealShiftSolve<eT>::SparseGenRealShiftSolve(const SpMat<eT>& mat_obj, c
     
     int   panel_size = superlu::sp_ispec_environ(1);
     int   relax      = superlu::sp_ispec_environ(2);
-    float drop_tol   = 0.0;
     int   slu_info   = 0; // Return code
     int   lwork      = 0; // lwork = 0: allocate space internally by system malloc
     
@@ -60,7 +59,7 @@ SparseGenRealShiftSolve<eT>::SparseGenRealShiftSolve(const SpMat<eT>& mat_obj, c
     arma_extra_debug_print("superlu::gstrf()");
     superlu::get_permutation_c(options.ColPerm, x.get_ptr(), perm_c.get_ptr());
     superlu::sp_preorder_mat(&options, x.get_ptr(), perm_c.get_ptr(), etree.get_ptr(), xC.get_ptr());
-    superlu::gstrf<eT>(&options, xC.get_ptr(), drop_tol, relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
+    superlu::gstrf<eT>(&options, xC.get_ptr(), relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
     
     if(slu_info != 0)
       {
diff --git a/include/armadillo_bits/sp_auxlib_meat.hpp b/include/armadillo_bits/sp_auxlib_meat.hpp
index 8a79f42d..85902a8a 100644
--- a/include/armadillo_bits/sp_auxlib_meat.hpp
+++ b/include/armadillo_bits/sp_auxlib_meat.hpp
@@ -1446,13 +1446,12 @@ sp_auxlib::spsolve_refine(Mat<typename T1::elem_type>& X, typename T1::pod_type&
 //     
 //     int   panel_size = superlu::sp_ispec_environ(1);
 //     int   relax      = superlu::sp_ispec_environ(2);
-//     float drop_tol   = 0.0;
 //     int   slu_info   = 0; // Return code.
 //     
 //     arma_extra_debug_print("superlu::gstrf()");
 //     superlu::get_permutation_c(options.ColPerm, a.get_ptr(), perm_c.get_ptr());
 //     superlu::sp_preorder_mat(&options, a.get_ptr(), perm_c.get_ptr(), etree.get_ptr(), aC.get_ptr());
-//     superlu::gstrf<T>(&options, aC.get_ptr(), drop_tol, relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
+//     superlu::gstrf<T>(&options, aC.get_ptr(), relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
 //     
 //     if(slu_info != 0)  { return T(0); }
 //     
@@ -2218,13 +2217,12 @@ sp_auxlib::run_aupd_shiftinvert
     
     int   panel_size = superlu::sp_ispec_environ(1);
     int   relax      = superlu::sp_ispec_environ(2);
-    float drop_tol   = 0.0;
     int   slu_info   = 0; // Return code.
     
     arma_extra_debug_print("superlu::gstrf()");
     superlu::get_permutation_c(options.ColPerm, x.get_ptr(), perm_c.get_ptr());
     superlu::sp_preorder_mat(&options, x.get_ptr(), perm_c.get_ptr(), etree.get_ptr(), xC.get_ptr());
-    superlu::gstrf<T>(&options, xC.get_ptr(), drop_tol, relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
+    superlu::gstrf<T>(&options, xC.get_ptr(), relax, panel_size, etree.get_ptr(), NULL, lwork, perm_c.get_ptr(), perm_r.get_ptr(), l.get_ptr(), u.get_ptr(), &Glu, stat.get_ptr(), &slu_info);
     
     if(slu_info != 0)
       {
diff --git a/include/armadillo_bits/translate_superlu.hpp b/include/armadillo_bits/translate_superlu.hpp
index b19f62ea..ae53b2b6 100644
--- a/include/armadillo_bits/translate_superlu.hpp
+++ b/include/armadillo_bits/translate_superlu.hpp
@@ -102,7 +102,7 @@ namespace superlu
   void
   gstrf(superlu_options_t* options,
         SuperMatrix* A,
-        typename get_pod_type<eT>::result drop_tol, int relax,
+        int relax,
         int panel_size, int *etree,
         void  *work,  int  lwork,
         int* perm_c, int* perm_r,
@@ -114,26 +114,22 @@ namespace superlu
 
     if(is_float<eT>::value)
       {
-      typedef float T;
-      arma_wrapper(sgstrf)(options, A, (T)drop_tol, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
+      arma_wrapper(sgstrf)(options, A, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
       }
     else
     if(is_double<eT>::value)
       {
-      typedef double T;
-      arma_wrapper(dgstrf)(options, A, (T)drop_tol, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
+      arma_wrapper(dgstrf)(options, A, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
       }
     else
     if(is_cx_float<eT>::value)
       {
-      typedef float T;
-      arma_wrapper(cgstrf)(options, A, (T)drop_tol, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
+      arma_wrapper(cgstrf)(options, A, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
       }
     else
     if(is_cx_double<eT>::value)
       {
-      typedef double T;
-      arma_wrapper(zgstrf)(options, A, (T)drop_tol, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
+      arma_wrapper(zgstrf)(options, A, relax, panel_size, etree, work, lwork, perm_c, perm_r, L, U, Glu, stat, info);
       }
     }
 
diff --git a/src/wrapper1.cpp b/src/wrapper1.cpp
index 8228b1e4..4de92c70 100644
--- a/src/wrapper1.cpp
+++ b/src/wrapper1.cpp
@@ -1588,24 +1588,24 @@ extern "C"
     
     
     
-    void wrapper_sgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b,  float c, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
+    void wrapper_sgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
       {
       sgstrf(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
       }
     
-    void wrapper_dgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, double c, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
+    void wrapper_dgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
       {
       dgstrf(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
       }
     
-    void wrapper_cgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b,  float c, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
+    void wrapper_cgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
       {
       cgstrf(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
       }
     
-    void wrapper_zgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, double c, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
+    void wrapper_zgstrf(superlu::superlu_options_t* a, superlu::SuperMatrix* b, int d, int e, int* f, void* g, int h, int* i, int* j, superlu::SuperMatrix* k, superlu::SuperMatrix* l, superlu::GlobalLU_t* m, superlu::SuperLUStat_t* n, int* o)
       {
-      zgstrf(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
+      zgstrf(a, b, d, e, f, g, h, i, j, k, l, m, n, o);
       }