diff --git a/keywords.go b/keywords.go
index fd8bc0a..9340695 100644
--- a/keywords.go
+++ b/keywords.go
@@ -36,8 +36,7 @@ func DataType(data interface{}) string {
 		return "null"
 	}
 
-	dataType := reflect.TypeOf(data)
-	kind := dataType.Kind()
+	kind := reflect.TypeOf(data).Kind()
 	typeStr, ok := dataTypes[kind]
 	if !ok {
 		return "unknown"