diff --git a/Source/Project64-core/N64System/Mips/RegisterClass.cpp b/Source/Project64-core/N64System/Mips/RegisterClass.cpp
index e7608340f..e7fcfbf0e 100644
--- a/Source/Project64-core/N64System/Mips/RegisterClass.cpp
+++ b/Source/Project64-core/N64System/Mips/RegisterClass.cpp
@@ -9,7 +9,9 @@
 *                                                                           *
 ****************************************************************************/
 #include "stdafx.h"
+#include <string.h>
 #include "RegisterClass.h"
+
 #include <Project64-core/N64System/N64Class.h>
 #include <Project64-core/N64System/SystemGlobals.h>
 #include <Project64-core/Logging.h>