1 files changed, 2 insertions, 2 deletions

diff --git a/src/image.c b/src/image.c
index 7901b95f236..91eeb91920c 100644
--- a/src/image.c
+++ b/src/image.c
@@ -186,11 +186,11 @@ x_bitmap_width (FRAME_PTR f, ptrdiff_t id)
 }
 
 #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI)
-int
+ptrdiff_t
 x_bitmap_pixmap (FRAME_PTR f, ptrdiff_t id)
 {
   /* HAVE_NTGUI needs the explicit cast here.  */
-  return (int) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap;
+  return (ptrdiff_t) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap;
 }
 #endif