diff --git a/shared/config-parser.c b/shared/config-parser.c
index 10f6f12e..5ffa4664 100644
--- a/shared/config-parser.c
+++ b/shared/config-parser.c
@@ -78,6 +78,8 @@ handle_key(const struct config_key *key, const char *value)
 		assert(0);
 		break;
 	}
+
+	return -1;
 }
 
 int