diff --git a/src/lowlevel.c b/src/lowlevel.c
index 38a1ab077..2fe153563 100644
--- a/src/lowlevel.c
+++ b/src/lowlevel.c
@@ -1,5 +1,11 @@
 #include <Mw/Milsko.h>
 
+#ifdef _WIN32
+void *MwLL_winmmLib;
+long (__stdcall* MwLL_PFN_timeGetTime)(void);
+unsigned int (__stdcall* MwLL_PFN_timeBeginPeriod)(unsigned int period);
+#endif
+
 MwLL (*MwLLCreate)(MwLL parent, int x, int y, int width, int height) = NULL;
 void (*MwLLDestroy)(MwLL handle)				     = NULL;