diff --git a/libsrc/geos/devel/.cvsignore b/libsrc/geos/devel/.cvsignore
new file mode 100644
index 000000000..58093ab1b
--- /dev/null
+++ b/libsrc/geos/devel/.cvsignore
@@ -0,0 +1,3 @@
+*.emd
+*.joy
+*.tgi