diff --git a/pipi/codec/imlib.c b/pipi/codec/imlib.c
index f229512..cbabff0 100644
--- a/pipi/codec/imlib.c
+++ b/pipi/codec/imlib.c
@@ -73,6 +73,7 @@ int pipi_save_imlib2(pipi_image_t *img, const char *name)
         void *data;
 
         imlib_context_set_image(priv);
+        imlib_image_set_has_alpha(1);
         data = imlib_image_get_data();
 
         /* FIXME: check pitch differences here */