diff --git a/project/src/system/Locale.cpp b/project/src/system/Locale.cpp
index add9aaded..91afb7a45 100644
--- a/project/src/system/Locale.cpp
+++ b/project/src/system/Locale.cpp
@@ -3,6 +3,7 @@
 #if defined(HX_WINDOWS)
 #include <windows.h>
 #elif defined(HX_LINUX)
+#include <stdlib.h>
 #include <clocale>
 #endif