diff --git a/datamodel/low/base/schema_proxy.go b/datamodel/low/base/schema_proxy.go
index 56c35f8..3260ee1 100644
--- a/datamodel/low/base/schema_proxy.go
+++ b/datamodel/low/base/schema_proxy.go
@@ -122,8 +122,6 @@ func (sp *SchemaProxy) Hash() [32]byte {
 		if !sp.isReference {
 			return sp.rendered.Hash()
 		}
-		// we only hash inline schemas
-		return sha256.Sum256([]byte(sp.referenceLookup))
 	} else {
 		if !sp.isReference {
 			// only resolve this proxy if it's not a ref.
diff --git a/datamodel/low/base/schema_proxy_test.go b/datamodel/low/base/schema_proxy_test.go
index 4525a48..8816135 100644
--- a/datamodel/low/base/schema_proxy_test.go
+++ b/datamodel/low/base/schema_proxy_test.go
@@ -50,3 +50,19 @@ func TestSchemaProxy_Build_CheckRef(t *testing.T) {
 	assert.Equal(t, "f00a787f7492a95e165b470702f4fe9373583fbdc025b2c8bdf0262cc48fcff4",
 		low.GenerateHashString(&sch))
 }
+
+func TestSchemaProxy_Build_HashInline(t *testing.T) {
+
+	yml := `type: int`
+
+	var sch SchemaProxy
+	var idxNode yaml.Node
+	_ = yaml.Unmarshal([]byte(yml), &idxNode)
+
+	err := sch.Build(idxNode.Content[0], nil)
+	assert.NoError(t, err)
+	assert.False(t, sch.IsSchemaReference())
+	assert.NotNil(t, sch.Schema())
+	assert.Equal(t, "6da88c34ba124c41f977db66a4fc5c1a951708d285c81bb0d47c3206f4c27ca8",
+		low.GenerateHashString(&sch))
+}
diff --git a/datamodel/low/base/schema_test.go b/datamodel/low/base/schema_test.go
index fff6db7..85ad870 100644
--- a/datamodel/low/base/schema_test.go
+++ b/datamodel/low/base/schema_test.go
@@ -1130,6 +1130,36 @@ func TestExtractSchema_DoNothing(t *testing.T) {
 
 }
 
+func TestExtractSchema_AdditionalProperties_Ref(t *testing.T) {
+
+	yml := `components:
+  schemas:
+    Nothing:
+      type: int
+    Something:
+      additionalProperties:
+        cake:
+          $ref: '#/components/schemas/Nothing'`
+
+	var iNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &iNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&iNode)
+
+	yml = `schema:
+  type: int
+  additionalProperties:
+    $ref: '#/components/schemas/Something'`
+
+	var idxNode yaml.Node
+	_ = yaml.Unmarshal([]byte(yml), &idxNode)
+
+	res, err := ExtractSchema(idxNode.Content[0], idx)
+	assert.NotNil(t, res.Value.Schema().AdditionalProperties.Value.(*SchemaProxy).Schema())
+	assert.Nil(t, err)
+
+}
+
 func TestExtractSchema_OneOfRef(t *testing.T) {
 
 	yml := `components:
diff --git a/what-changed/what_changed_test.go b/what-changed/what_changed_test.go
index 3a16d27..c106432 100644
--- a/what-changed/what_changed_test.go
+++ b/what-changed/what_changed_test.go
@@ -41,3 +41,18 @@ func Benchmark_CompareOpenAPIDocuments(b *testing.B) {
 		CompareOpenAPIDocuments(origDoc, modDoc)
 	}
 }
+
+func Benchmark_CompareOpenAPIDocuments_NoChange(b *testing.B) {
+
+	original, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
+	modified, _ := ioutil.ReadFile("../test_specs/burgershop.openapi.yaml")
+
+	infoOrig, _ := datamodel.ExtractSpecInfo(original)
+	infoMod, _ := datamodel.ExtractSpecInfo(modified)
+	origDoc, _ := v3.CreateDocument(infoOrig)
+	modDoc, _ := v3.CreateDocument(infoMod)
+
+	for i := 0; i < b.N; i++ {
+		CompareOpenAPIDocuments(origDoc, modDoc)
+	}
+}