1 files changed, 2 insertions, 0 deletions
diff --git a/src/driver/gd.php b/src/driver/gd.php
index 1662a1d..be2da37 100644
--- a/src/driver/gd.php
+++ b/src/driver/gd.php
@@ -1182,6 +1182,8 @@ class ezcGraphGdDriver extends ezcGraphDriver
             case IMG_JPEG:
                 imagejpeg( $image, $file, $this->options->jpegQuality );
                 break;
+            default:
+                throw new ezcGraphGdDriverUnsupportedImageTypeException( $this->options->imageFormat );
         }
     }
 }