diff --git a/src/mlpack/methods/matrix_completion/matrix_completion.hpp b/src/mlpack/methods/matrix_completion/matrix_completion.hpp
index 44d0ab8f23..8023822958 100644
--- a/src/mlpack/methods/matrix_completion/matrix_completion.hpp
+++ b/src/mlpack/methods/matrix_completion/matrix_completion.hpp
@@ -14,6 +14,7 @@
 #define MLPACK_METHODS_MATRIX_COMPLETION_MATRIX_COMPLETION_HPP
 
 #include <ensmallen.hpp>
+#include <mlpack/prereqs.hpp>
 
 namespace mlpack {
 namespace matrix_completion {