diff --git a/reactos/ntoskrnl/include/internal/mm.h b/reactos/ntoskrnl/include/internal/mm.h
index 16d8613a983..bbee395c7cf 100644
--- a/reactos/ntoskrnl/include/internal/mm.h
+++ b/reactos/ntoskrnl/include/internal/mm.h
@@ -194,7 +194,11 @@ typedef struct _MADDRESS_SPACE
 #ifndef __USE_W32API
 /* VARIABLES */
 
-extern PVOID MmSystemRangeStart;
+#ifdef __NTOSKRNL__
+extern PVOID EXPORTED MmSystemRangeStart;
+#else
+extern PVOID IMPORTED MmSystemRangeStart;
+#endif
 
 #endif /* __USE_W32API */