diff --git a/lparser.c b/lparser.c
index 1850d6dc..af2b64d1 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1166,6 +1166,7 @@ static void funcargs (LexState *ls, expdesc *f) {
     }
     default: {
       luaX_syntaxerror(ls, "function arguments expected");
+      return;  /* to avoid warnings */
     }
   }
   lua_assert(f->k == VNONRELOC);