diff --git a/include/armadillo_bits/Base_bones.hpp b/include/armadillo_bits/Base_bones.hpp
index 21fcbc68..6b10b36f 100644
--- a/include/armadillo_bits/Base_bones.hpp
+++ b/include/armadillo_bits/Base_bones.hpp
@@ -58,7 +58,7 @@ struct Base_eval_Mat
 template<typename elem_type, typename derived>
 struct Base_eval_expr
   {
-  arma_inline Mat<elem_type> eval() const;   //!< force the immediate evaluation of a delayed expression
+  inline arma_warn_unused Mat<elem_type> eval() const;   //!< force the immediate evaluation of a delayed expression
   };
 
 
diff --git a/include/armadillo_bits/Base_meat.hpp b/include/armadillo_bits/Base_meat.hpp
index 9b707772..73bd0bd2 100644
--- a/include/armadillo_bits/Base_meat.hpp
+++ b/include/armadillo_bits/Base_meat.hpp
@@ -922,7 +922,8 @@ Base_eval_Mat<elem_type, derived>::eval() const
 // extra functions defined in Base_eval_expr
 
 template<typename elem_type, typename derived>
-arma_inline
+inline
+arma_warn_unused
 Mat<elem_type>
 Base_eval_expr<elem_type, derived>::eval() const
   {