diff --git a/sys/kern/uipc_sockbuf.c b/sys/kern/uipc_sockbuf.c
index 5685bc012547..f8e3779b6986 100644
--- a/sys/kern/uipc_sockbuf.c
+++ b/sys/kern/uipc_sockbuf.c
@@ -1043,7 +1043,7 @@ sbcut_internal(struct sockbuf *sb, int len)
 {
 	struct mbuf *m, *next, *mfree;
 
-	KASSERT(len > 0, ("%s: len is %d but it is supposed to be +ve",
+	KASSERT(len >= 0, ("%s: len is %d but it is supposed to be >= 0",
 	    __func__, len));
 	KASSERT(len <= sb->sb_ccc, ("%s: len: %d is > ccc: %u",
 	    __func__, len, sb->sb_ccc));