diff --git a/src/pl/plpgsql/src/pl_handler.c b/src/pl/plpgsql/src/pl_handler.c
index fce459ade0..3f7548cb9d 100644
--- a/src/pl/plpgsql/src/pl_handler.c
+++ b/src/pl/plpgsql/src/pl_handler.c
@@ -320,7 +320,7 @@ plpgsql_inline_handler(PG_FUNCTION_ARGS)
 	FmgrInfo	flinfo;
 	EState	   *simple_eval_estate;
 	ResourceOwner simple_eval_resowner;
-	Datum		retval;
+	volatile Datum retval = (Datum) 0;
 	int			rc;
 
 	/*