diff --git a/simgear/io/.cvsignore b/simgear/io/.cvsignore
index e69059bd..1226dca7 100644
--- a/simgear/io/.cvsignore
+++ b/simgear/io/.cvsignore
@@ -4,3 +4,5 @@ Makefile.in
 decode_binobj
 lowtest
 socktest
+tcp_client
+tcp_server