diff --git a/Cantera/clib/src/.cvsignore b/Cantera/clib/src/.cvsignore
index db1a5c99a..b431c8461 100644
--- a/Cantera/clib/src/.cvsignore
+++ b/Cantera/clib/src/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 .depends
 SunWS_cache
+*.d