diff --git a/sys/dev/safe/safe.c b/sys/dev/safe/safe.c
index 93714ca32276..a6a013727a23 100644
--- a/sys/dev/safe/safe.c
+++ b/sys/dev/safe/safe.c
@@ -1593,9 +1593,7 @@ safe_mcopy(struct mbuf *srcm, struct mbuf *dstm, u_int offset)
 	 * Advance src and dst to offset.
 	 */
 	j = offset;
-	while (j >= 0) {
-		if (srcm->m_len > j)
-			break;
+	while (j >= srcm->m_len) {
 		j -= srcm->m_len;
 		srcm = srcm->m_next;
 		if (srcm == NULL)
@@ -1605,9 +1603,7 @@ safe_mcopy(struct mbuf *srcm, struct mbuf *dstm, u_int offset)
 	slen = srcm->m_len - j;
 
 	j = offset;
-	while (j >= 0) {
-		if (dstm->m_len > j)
-			break;
+	while (j >= dstm->m_len) {
 		j -= dstm->m_len;
 		dstm = dstm->m_next;
 		if (dstm == NULL)