diff --git a/lib/puppet/parser/functions/defined_with_params.rb b/lib/puppet/parser/functions/defined_with_params.rb
index 138330808..fb0cd8c07 100644
--- a/lib/puppet/parser/functions/defined_with_params.rb
+++ b/lib/puppet/parser/functions/defined_with_params.rb
@@ -31,7 +31,7 @@
       type_name, title = Puppet::Resource.type_and_title(reference, nil)
       type = Puppet::Pops::Evaluator::Runtime3ResourceSupport.find_resource_type_or_class(find_global_scope, type_name.downcase)
     elsif reference.is_a?(Puppet::Resource)
-      type = reference.resource_type
+      type = reference.type
       title = reference.title
     else
       raise(ArgumentError, "Reference is not understood: '#{reference.class}'")
diff --git a/spec/acceptance/defined_with_params_spec.rb b/spec/acceptance/defined_with_params_spec.rb
index b12927a25..d8e5c8c7f 100644
--- a/spec/acceptance/defined_with_params_spec.rb
+++ b/spec/acceptance/defined_with_params_spec.rb
@@ -2,7 +2,7 @@
 
 describe 'defined_with_params function' do
   describe 'success' do
-    pp = <<-DOC
+    pp1 = <<-DOC
       user { 'dan':
         ensure => present,
       }
@@ -11,10 +11,29 @@
         notify { 'User defined with ensure=>present': }
       }
     DOC
-    it 'successfullies notify' do
-      apply_manifest(pp, :catch_failures => true) do |r|
+    it 'successfullies checks a type' do
+      apply_manifest(pp1, :catch_failures => true) do |r|
         expect(r.stdout).to match(%r{Notice: User defined with ensure=>present})
       end
     end
+
+    pp2 = <<-DOC
+      class foo (
+        $bar,
+      ) {}
+
+      class { 'foo':
+        bar => 'baz',
+      }
+
+      if defined_with_params(Class[foo], { 'bar' => 'baz' }) {
+        notify { 'Class foo defined with bar=>baz': }
+      }
+    DOC
+    it 'successfullies checks a class' do
+      apply_manifest(pp2, :catch_failures => true) do |r|
+        expect(r.stdout).to match(%r{Notice: Class foo defined with bar=>baz})
+      end
+    end
   end
 end
diff --git a/spec/functions/defined_with_params_spec.rb b/spec/functions/defined_with_params_spec.rb
index b78c7e360..74f9a7ccc 100644
--- a/spec/functions/defined_with_params_spec.rb
+++ b/spec/functions/defined_with_params_spec.rb
@@ -71,4 +71,17 @@
     it { is_expected.to run.with_params(Puppet::Resource.new('Test::Deftype[foo]'), {}).and_return(true) }
     it { is_expected.to run.with_params(Puppet::Resource.new('Test::Deftype[bar]'), {}).and_return(false) }
   end
+
+  describe 'when passed a class' do
+    let :pre_condition do
+      'class test () { } class { "test": }'
+    end
+
+    it { is_expected.to run.with_params('Class[test]', {}).and_return(true) }
+    it { is_expected.to run.with_params('Class["bar"]', {}).and_return(false) }
+    it { is_expected.to run.with_params('Class[bar]', {}).and_return(false) }
+    it { is_expected.to run.with_params(Puppet::Resource.new('class', 'test'), {}).and_return(true) }
+    it { is_expected.to run.with_params(Puppet::Resource.new('Class["bar"]'), {}).and_return(false) }
+    it { is_expected.to run.with_params(Puppet::Resource.new('Class[bar]'), {}).and_return(false) }
+  end
 end