diff --git a/sys/net/if_var.h b/sys/net/if_var.h
index 8632ea2f3af3..62c4bfdd33fb 100644
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -496,7 +496,7 @@ extern	struct sx ifnet_sxlock;
 /*
  * Look up an ifnet given its index; the _ref variant also acquires a
  * reference that must be freed using if_rele().  It is almost always a bug
- * to call ifnet_byindex() instead if ifnet_byindex_ref().
+ * to call ifnet_byindex() instead of ifnet_byindex_ref().
  */
 struct ifnet	*ifnet_byindex(u_short idx);
 struct ifnet	*ifnet_byindex_locked(u_short idx);