diff --git a/src/feh.h b/src/feh.h
index b25b3cc77b5d83dd76fa7be939efb75e91e63652..6604f66ce3ad262af2c92e1e97222c9563b640a5 100644
--- a/src/feh.h
+++ b/src/feh.h
@@ -93,7 +93,7 @@ enum bgmode_type { BG_MODE_NONE = 0, BG_MODE_TILE, BG_MODE_CENTER,
 	BG_MODE_SCALE, BG_MODE_FILL, BG_MODE_MAX
 };
 
-enum zoom_mode { ZOOM_MODE_FILL, ZOOM_MODE_MAX };
+enum zoom_mode { ZOOM_MODE_FILL = 1, ZOOM_MODE_MAX };
 
 enum text_bg { TEXT_BG_CLEAR = 0, TEXT_BG_TINTED };