diff --git a/libsrc/c64/.cvsignore b/libsrc/c64/.cvsignore
index 58093ab1b..581e5ff62 100644
--- a/libsrc/c64/.cvsignore
+++ b/libsrc/c64/.cvsignore
@@ -1,3 +1,4 @@
 *.emd
 *.joy
+*.ser
 *.tgi