diff --git a/src/nsimage.m b/src/nsimage.m
index cc8abf76094..e87da77ccf1 100644
--- a/src/nsimage.m
+++ b/src/nsimage.m
@@ -302,7 +302,7 @@ - (void)dealloc
           planes[1][i] = gg;
           planes[2][i] = bb;
         }
-    xbm_fg = ((rr << 16) & 0xff) + ((gg << 8) & 0xff) + (bb & 0xff);
+    xbm_fg = ((rr << 16) & 0xff0000) + ((gg << 8) & 0xff00) + (bb & 0xff);
   }
 
   return self;