diff --git a/src/compositor/compositor-xrender.c b/src/compositor/compositor-xrender.c

index dbd7bd9..9bf9d8d 100644

--- a/src/compositor/compositor-xrender.c

+++ b/src/compositor/compositor-xrender.c

@@ -911,6 +911,12 @@ window_has_shadow (MetaCompWindow *cw)

       }

     }

+  /* Do not add shadows to ARGB windows */

+  if (cw->mode == WINDOW_ARGB) {

+    meta_verbose ("Window has no shadow as it is ARGB\n");

+    return FALSE;

+  }

+

   /* Never put a shadow around shaped windows */

   if (cw->shaped) {

     meta_verbose ("Window has no shadow as it is shaped\n");