diff --git a/plug-ins/file-psd/psd-load.c b/plug-ins/file-psd/psd-load.c
index 7f018de5c4..edfd30b81d 100644
--- a/plug-ins/file-psd/psd-load.c
+++ b/plug-ins/file-psd/psd-load.c
@@ -1546,6 +1546,7 @@ add_merged_image (const gint32  image_id,
 
           case PSD_COMP_ZIP:                 /* ? */
           case PSD_COMP_ZIP_PRED:
+          default:
             g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
                         _("Unsupported compression mode: %d"), comp_mode);
             return -1;