diff --git a/advice.c b/advice.c
index e5a9bb9b44..50c79443ba 100644
--- a/advice.c
+++ b/advice.c
@@ -191,9 +191,10 @@ int error_resolve_conflict(const char *me)
 		error(_("Pulling is not possible because you have unmerged files."));
 	else if (!strcmp(me, "revert"))
 		error(_("Reverting is not possible because you have unmerged files."));
+	else if (!strcmp(me, "rebase"))
+		error(_("Rebasing is not possible because you have unmerged files."));
 	else
-		error(_("It is not possible to %s because you have unmerged files."),
-			me);
+		BUG("Unhandled conflict reason '%s'", me);
 
 	if (advice_enabled(ADVICE_RESOLVE_CONFLICT))
 		/*