diff --git a/query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y b/query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
index 82036aa42..0900f1215 100644
--- a/query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
+++ b/query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
@@ -3510,6 +3510,7 @@ cmd ::= optimize(X). {
 }
 
 %type optimize {SrcList*}
+%destructor optimize {sqlite3SrcListDelete(pParse->db, $$);}
 
 optimize_arg1_opt ::= .
 optimize_arg1_opt ::= LOCAL.