--- ../delegate9.9.13.bkup/src/env.c	2014-10-23 23:35:58.000000000 +0900
+++ ./src/env.c	2023-01-27 13:24:28.617313172 +0900
@@ -2080,7 +2080,7 @@
 	if( *ereq ){
 		putenv(ereq);
 	}
-	if( 0 <= esock ){
+	if( 0 <= (unsigned long)esock ){
 		sprintf(esock,"CLSOCK=%d",ClientSock);
 		putenv(esock);
 	}