diff --git a/manifests/ppa.pp b/manifests/ppa.pp
index 6352352..d6b4900 100644
--- a/manifests/ppa.pp
+++ b/manifests/ppa.pp
@@ -16,7 +16,8 @@ define apt::ppa(
 
   $filename_without_slashes = regsubst($name, '/', '-', 'G')
   $filename_without_dots    = regsubst($filename_without_slashes, '\.', '_', 'G')
-  $filename_without_ppa     = regsubst($filename_without_dots, '^ppa:', '', 'G')
+  $filename_without_pluses  = regsubst($filename_without_dots, '\+', '_', 'G')
+  $filename_without_ppa     = regsubst($filename_without_pluses, '^ppa:', '', 'G')
   $sources_list_d_filename  = "${filename_without_ppa}-${release}.list"
 
   if $ensure == 'present' {
diff --git a/spec/defines/ppa_spec.rb b/spec/defines/ppa_spec.rb
index b7a2f6c..fe25978 100644
--- a/spec/defines/ppa_spec.rb
+++ b/spec/defines/ppa_spec.rb
@@ -16,12 +16,12 @@ describe 'apt::ppa' do
       }
     end
 
-    let(:title) { 'ppa:needs/such.substitution/wow' }
+    let(:title) { 'ppa:needs/such.substitution/wow+type' }
     it { is_expected.to_not contain_package('python-software-properties') }
-    it { is_expected.to contain_exec('add-apt-repository-ppa:needs/such.substitution/wow').that_notifies('Class[Apt::Update]').with({
+    it { is_expected.to contain_exec('add-apt-repository-ppa:needs/such.substitution/wow+type').that_notifies('Class[Apt::Update]').with({
       :environment => [],
-      :command     => '/usr/bin/add-apt-repository -y ppa:needs/such.substitution/wow',
-      :unless      => '/usr/bin/test -s /etc/apt/sources.list.d/needs-such_substitution-wow-natty.list',
+      :command     => '/usr/bin/add-apt-repository -y ppa:needs/such.substitution/wow+type',
+      :unless      => '/usr/bin/test -s /etc/apt/sources.list.d/needs-such_substitution-wow_type-natty.list',
       :user        => 'root',
       :logoutput   => 'on_failure',
     })