diff --git a/extensions/image_viewer/callbacks.c b/extensions/image_viewer/callbacks.c
index eede313b..04b5da54 100644
--- a/extensions/image_viewer/callbacks.c
+++ b/extensions/image_viewer/callbacks.c
@@ -30,7 +30,10 @@
 
 static const GthShortcut shortcuts[] = {
 	{ "image-zoom-in", N_("Zoom in"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "plus" },
+	{ "image-zoom-in", N_("Zoom in"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "equal" },
+	{ "image-zoom-in", N_("Zoom in"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "KP_Add" },
 	{ "image-zoom-out", N_("Zoom out"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "minus" },
+	{ "image-zoom-out", N_("Zoom out"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "KP_Subtract" },
 	{ "image-zoom-100", N_("Zoom 100%"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "1" },
 	{ "image-zoom-200", N_("Zoom 200%"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "2" },
 	{ "image-zoom-300", N_("Zoom 300%"), GTH_SHORTCUT_CONTEXT_VIEWER, GTH_SHORTCUT_CATEGORY_IMAGE_VIEWER, "3" },