diff --git a/lua/lua.c b/lua/lua.c
index 78e906a..e1892d9 100644
--- a/lua/lua.c
+++ b/lua/lua.c
@@ -466,6 +466,7 @@ int lua_repl(char *_pcBuffer, int _iSize, int _iEcho)
     if (strcmp(line, "exit") == 0) 
     {
         RD_FREE(line);
+        line = NULL;
         iRet = RD_SUCCESS;
         goto cleanup;
     }
@@ -626,6 +627,7 @@ cleanup:
         wrapped_code = NULL;
     }
     RD_FREE(buffer);
+    buffer = NULL;
     lua_close(L);
     L = NULL;
     lua_init(lua_print);