diff --git a/source/lib/sysdep/win/win.cpp b/source/lib/sysdep/win/win.cpp
index db2cbd1e51..8fe26b2140 100755
--- a/source/lib/sysdep/win/win.cpp
+++ b/source/lib/sysdep/win/win.cpp
@@ -39,12 +39,13 @@ void sle(int x)
 //
 
 
-void check_heap()
+inline void check_heap()
 {
 	_heapchk();
 }
 
 
+
 void display_msg(const char* caption, const char* msg)
 {
 	MessageBoxA(0, msg, caption, MB_ICONEXCLAMATION);