diff --git a/sys/netipsec/ipsec.c b/sys/netipsec/ipsec.c
index b2c31d0ce5ef..4038c005d545 100644
--- a/sys/netipsec/ipsec.c
+++ b/sys/netipsec/ipsec.c
@@ -1780,7 +1780,7 @@ ok:
 }
 
 /*
- * shift variable length bunffer to left.
+ * shift variable length buffer to left.
  * IN:	bitmap: pointer to the buffer
  * 	nbit:	the number of to shift.
  *	wsize:	buffer size (bytes).