diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index bc0e88d0a47..85e0e395528 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -948,9 +948,8 @@ m_adj(struct mbuf *mp, int req_len)
 				len = 0;
 			}
 		}
-		m = mp;
 		if (mp->m_flags & M_PKTHDR)
-			m->m_pkthdr.len -= (req_len - len);
+			mp->m_pkthdr.len -= (req_len - len);
 	} else {
 		/*
 		 * Trim from tail.  Scan the mbuf chain,