diff --git a/lib/puppet/modulebuilder/builder.rb b/lib/puppet/modulebuilder/builder.rb
index f0dd472..4de0604 100644
--- a/lib/puppet/modulebuilder/builder.rb
+++ b/lib/puppet/modulebuilder/builder.rb
@@ -19,6 +19,7 @@ class Builder
       '!/data/**',
       '!/docs/**',
       '!/files/**',
+      '!/functions/**',
       '!/hiera.yaml',
       '!/lib/**',
       '!/locales/**',