diff --git a/libsrc/nes/.cvsignore b/libsrc/nes/.cvsignore
new file mode 100644
index 000000000..3eecd7b49
--- /dev/null
+++ b/libsrc/nes/.cvsignore
@@ -0,0 +1,5 @@
+*.emd
+*.joy
+*.mou
+*.ser
+*.tgi