diff --git a/src/parser_stmt.c b/src/parser_stmt.c
index 4dfda0b..81ccbfc 100644
--- a/src/parser_stmt.c
+++ b/src/parser_stmt.c
@@ -2344,6 +2344,7 @@
         ret = lysp_stmt_choice(&pctx, stmt, NULL, (struct lysp_node **)result);
         break;
     case LY_STMT_CONFIG:
+        assert(*result);
         ret = lysp_stmt_config(&pctx, stmt, *(uint16_t **)result, exts);
         break;
     case LY_STMT_CONTACT: