diff --git a/.gitignore b/.gitignore
index 730731f295c86865edfdeb710d3f0776e24d7fc3..23c48be7f3d776400b3abe1ed527218742815492 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,8 @@
 
 # *all* Makefiles
 Makefile
+# ... except in demos
+!/demos/*/Makefile
 
 # Links under apps
 /apps/CA.pl