diff --git a/manifests/params.pp b/manifests/params.pp
index b75a0e7..ea1087e 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -4,9 +4,9 @@ class apt::params {
     fail('This module only works on Debian or derivatives like Ubuntu')
   }
 
-  # prior to puppet 3.5.0, defined couldn't test if a variable was defined
-  # strict variables wasn't added until 3.5.0, so this should be fine.
-  if ! $::settings::strict_variables {
+  # prior to puppet 3.5.0, defined() couldn't test if a variable was defined.
+  # strict_variables wasn't added until 3.5.0, so this should be fine.
+  if $::puppetversion and versioncmp($::puppetversion, '3.5.0') < 0 {
     $xfacts = {
       'lsbdistcodename'     => $::lsbdistcodename,
       'lsbdistrelease'      => $::lsbdistrelease,
diff --git a/spec/defines/key_compat_spec.rb b/spec/defines/key_compat_spec.rb
index 2faee9e..7937c78 100644
--- a/spec/defines/key_compat_spec.rb
+++ b/spec/defines/key_compat_spec.rb
@@ -4,6 +4,7 @@ describe 'apt::key', :type => :define do
   let(:facts) { {
     :lsbdistid => 'Debian',
     :osfamily => 'Debian',
+    :puppetversion => Puppet.version,
   } }
   GPG_KEY_ID = '47B320EB4C7C375AA9DAE1A01054B7A24BD6EC30'
 
diff --git a/spec/defines/source_compat_spec.rb b/spec/defines/source_compat_spec.rb
index 0b98176..11d6d3a 100644
--- a/spec/defines/source_compat_spec.rb
+++ b/spec/defines/source_compat_spec.rb
@@ -13,6 +13,7 @@ describe 'apt::source', :type => :define do
         :lsbdistid       => 'Debian',
         :lsbdistcodename => 'wheezy',
         :osfamily        => 'Debian',
+        :puppetversion   => Puppet.version,
       }
     end
 
@@ -34,6 +35,7 @@ describe 'apt::source', :type => :define do
         :lsbdistid       => 'Debian',
         :lsbdistcodename => 'wheezy',
         :osfamily        => 'Debian'
+        :puppetversion   => Puppet.version,
       }
     end
     let :params do
@@ -88,7 +90,8 @@ describe 'apt::source', :type => :define do
       {
         :lsbdistid       => 'Debian',
         :lsbdistcodename => 'wheezy',
-        :osfamily        => 'Debian'
+        :osfamily        => 'Debian',
+        :puppetversion   => Puppet.version,
       }
     end
     let :params do
@@ -107,7 +110,8 @@ describe 'apt::source', :type => :define do
       {
         :lsbdistid       => 'Debian',
         :lsbdistcodename => 'wheezy',
-        :osfamily        => 'Debian'
+        :osfamily        => 'Debian',
+        :puppetversion   => Puppet.version,
       }
     end
     let :params do
@@ -126,7 +130,8 @@ describe 'apt::source', :type => :define do
       {
         :lsbdistid       => 'Debian',
         :lsbdistcodename => 'wheezy',
-        :osfamily        => 'Debian'
+        :osfamily        => 'Debian',
+        :puppetversion   => Puppet.version,
       }
     end
     let :params do
@@ -146,7 +151,8 @@ describe 'apt::source', :type => :define do
       let :facts do
         {
           :lsbdistid       => 'Debian',
-          :osfamily        => 'Debian'
+          :osfamily        => 'Debian',
+          :puppetversion   => Puppet.version,
         }
       end