diff --git a/src/term.c b/src/term.c
index 6379b4ce4a1..69abbc23d92 100644
--- a/src/term.c
+++ b/src/term.c
@@ -4882,6 +4882,7 @@ tty_display_dimension (Lisp_Object frame, int *width, int *height)
     case output_pgtk:
     case output_haiku:
     case output_android:
+    default:
       emacs_abort ();
       break;
     }