diff --git a/win/win32/mhmap.c b/win/win32/mhmap.c
index 67b630d81..ed3d4738c 100644
--- a/win/win32/mhmap.c
+++ b/win/win32/mhmap.c
@@ -1010,7 +1010,7 @@ static void dirty(PNHMapWindow data, int x, int y)
     data->mapDirty[x][y] = TRUE;
 
     RECT rt;
-    nhcoord2display(data, data->xCur, data->yCur, &rt);
+    nhcoord2display(data, x, y, &rt);
 
     InvalidateRect(data->hWnd, &rt, FALSE);
 }