diff --git a/src/llua.c b/src/llua.c
index b44e309..b39775b 100644
--- a/src/llua.c
+++ b/src/llua.c
@@ -83,7 +83,8 @@ lua_State* llua_newState(void) {
 /* Open a lua library. */
 int llua_load(lua_State* L, lua_CFunction f) {
   lua_pushcfunction(L, f);
-  lua_pcall(L, 0, 0, 0);
+  if(lua_pcall(L, 0, 0, 0))
+    WARN("llua include error: %s", lua_tostring(L, -1));
 
   return 0;
 }