1 files changed, 1 insertions, 1 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index 6bb0c3a6aae..37ae7ee5fd5 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -431,7 +431,7 @@ struct glyph
     } cmp;
 
     /* Image ID for image glyphs (type == IMAGE_GLYPH).  */
-    unsigned img_id;
+    int img_id;
 
     /* Sub-structure for type == STRETCH_GLYPH.  */
     struct