diff --git a/src/backend/utils/adt/jsonpath_gram.y b/src/backend/utils/adt/jsonpath_gram.y
index 8c3a0c7623..30179408f5 100644
--- a/src/backend/utils/adt/jsonpath_gram.y
+++ b/src/backend/utils/adt/jsonpath_gram.y
@@ -560,6 +560,8 @@ makeItemLikeRegex(JsonPathParseItem *expr, JsonPathString *pattern,
 					(errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
 					 errmsg("invalid regular expression: %s", errMsg)));
 		}
+
+		pg_regfree(&re_tmp);
 	}
 
 	*result = v;