diff --git a/pie/restorer.c b/pie/restorer.c
index 44f8a32b2..e7b282bc2 100644
--- a/pie/restorer.c
+++ b/pie/restorer.c
@@ -693,7 +693,7 @@ long __export_restore_task(struct task_restore_core_args *args)
 
 	ret = sys_munmap(args->task_entries, TASK_ENTRIES_SIZE);
 	if (ret < 0) {
-		ret = ((long)__LINE__ << 32) | -ret;
+		ret = ((long)__LINE__ << 16) | ((-ret) & 0xffff);
 		goto core_restore_failed;
 	}