diff --git a/termite.cc b/termite.cc
index a516331..b9c99fb 100644
--- a/termite.cc
+++ b/termite.cc
@@ -1028,9 +1028,11 @@ gboolean key_press_cb(VteTerminal *vte, GdkEventKey *event, keybind_info *info)
                 overlay_show(&info->panel, overlay_mode::completion, vte);
                 return TRUE;
             case GDK_KEY_plus:
+            case GDK_KEY_KP_Add:
                 increase_font_scale(vte);
                 return TRUE;
             case GDK_KEY_minus:
+            case GDK_KEY_KP_Subtract:
                 decrease_font_scale(vte);
                 return TRUE;
             case GDK_KEY_equal: