diff --git a/helper/schema/schema.go b/helper/schema/schema.go
index e476e8039..752687d54 100644
--- a/helper/schema/schema.go
+++ b/helper/schema/schema.go
@@ -466,6 +466,8 @@ func (m schemaMap) diff(
 		fallthrough
 	case TypeInt:
 		fallthrough
+	case TypeFloat:
+		fallthrough
 	case TypeString:
 		err = m.diffString(k, schema, diff, d, all)
 	case TypeList:
diff --git a/helper/schema/schema_test.go b/helper/schema/schema_test.go
index 91e7ed9ec..c9b2821f2 100644
--- a/helper/schema/schema_test.go
+++ b/helper/schema/schema_test.go
@@ -1790,7 +1790,7 @@ func TestSchemaMap_Diff(t *testing.T) {
 
 			Diff: &terraform.InstanceDiff{
 				Attributes: map[string]*terraform.ResourceAttrDiff{
-					"port": &terraform.ResourceAttrDiff{
+					"some_threshold": &terraform.ResourceAttrDiff{
 						Old: "567.8",
 						New: "12.34",
 					},