diff --git a/src/pl/plpgsql/src/pl_exec.c b/src/pl/plpgsql/src/pl_exec.c
index fc0f0f0..ae8bed0 100644
--- a/src/pl/plpgsql/src/pl_exec.c
+++ b/src/pl/plpgsql/src/pl_exec.c
@@ -2193,6 +2193,9 @@ exec_stmt_call(PLpgSQL_execstate *estate, PLpgSQL_stmt_call *stmt)
 	exec_eval_cleanup(estate);
 	SPI_freetuptable(SPI_tuptable);
 
+	if (!expr->plan->saved)
+		expr->plan = NULL;
+
 	return PLPGSQL_RC_OK;
 }