diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index bcb9354364a..cf66a28cf2c 100644
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -958,6 +958,8 @@ each_worker(PG_FUNCTION_ARGS, bool as_text)
 
 	pg_parse_json(lex, sem);
 
+	MemoryContextDelete(state->tmp_cxt); 
+
 	rsi->setResult = state->tuple_store;
 	rsi->setDesc = state->ret_tdesc;
 
@@ -1125,6 +1127,8 @@ json_array_elements(PG_FUNCTION_ARGS)
 
 	pg_parse_json(lex, sem);
 
+	MemoryContextDelete(state->tmp_cxt); 
+
 	rsi->setResult = state->tuple_store;
 	rsi->setDesc = state->ret_tdesc;