diff --git a/src/spicelib/devices/bsim3soi/.cvsignore b/src/spicelib/devices/bsim3soi/.cvsignore
new file mode 100644
index 000000000..dc4caac80
--- /dev/null
+++ b/src/spicelib/devices/bsim3soi/.cvsignore
@@ -0,0 +1,6 @@
+Makefile.in
+Makefile
+.deps
+.libs
+*.lo
+*.la