diff --git a/sys/netpfil/ipfw/dn_aqm.h b/sys/netpfil/ipfw/dn_aqm.h
index da47f00fae2..d01e98ebeaf 100644
--- a/sys/netpfil/ipfw/dn_aqm.h
+++ b/sys/netpfil/ipfw/dn_aqm.h
@@ -28,7 +28,7 @@
  */
 
 /*
- * API for writting an Active Queue Management algorithm for Dummynet
+ * API for writing an Active Queue Management algorithm for Dummynet
  *
  * $FreeBSD$
  */