Index: sbin/ping/ping.c
===================================================================
--- sbin/ping/ping.c
+++ sbin/ping/ping.c
@@ -920,7 +920,7 @@
 		if (n == 1) {
 			struct timespec *tv = NULL;
 #ifdef SO_TIMESTAMP
-			struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
+			struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
 
 			msg.msg_controllen = sizeof(ctrl);
 #endif