diff --git a/Cantera/src/converters/.cvsignore b/Cantera/src/converters/.cvsignore
index 57751bad9..db1a5c99a 100644
--- a/Cantera/src/converters/.cvsignore
+++ b/Cantera/src/converters/.cvsignore
@@ -1,2 +1,3 @@
 Makefile
 .depends
+SunWS_cache