diff --git a/Cantera/clib/src/Makefile.in b/Cantera/clib/src/Makefile.in
index 7bd88d876..ae8480ed2 100755
--- a/Cantera/clib/src/Makefile.in
+++ b/Cantera/clib/src/Makefile.in
@@ -80,6 +80,10 @@ endif
 
 clean:
 	$(RM) $(OBJS) $(CTLIB)
+	(if test -d SunWS_cache ; then \
+           $(RM) -rf SunWS_cache ; \
+         fi )
+
 
 install:
 	@INSTALL@ -d @ct_libdir@
diff --git a/Cantera/src/.cvsignore b/Cantera/src/.cvsignore
index dcdfcff32..2dc2660ec 100644
--- a/Cantera/src/.cvsignore
+++ b/Cantera/src/.cvsignore
@@ -4,4 +4,5 @@ ctdir.h
 .depends
 config.h
 *.d
+SunWS_cache