diff --git a/reactos/base/applications/charmap/map.c b/reactos/base/applications/charmap/map.c
index 3456e62c483..04c91ca7388 100644
--- a/reactos/base/applications/charmap/map.c
+++ b/reactos/base/applications/charmap/map.c
@@ -492,7 +492,7 @@ MapWndProc(HWND hwnd,
 
         case FM_GETCHAR:
         {
-            if (!infoPtr->pActiveCell) return NULL;
+            if (!infoPtr->pActiveCell) return 0;
             return infoPtr->pActiveCell->ch;
         }