diff --git a/lib/isc/unix/include/isc/.cvsignore b/lib/isc/unix/include/isc/.cvsignore
index f3c7a7c5da..dbcc054f88 100644
--- a/lib/isc/unix/include/isc/.cvsignore
+++ b/lib/isc/unix/include/isc/.cvsignore
@@ -1 +1,2 @@
 Makefile
+net.h