minor nits
diff --git a/tensorflow/lite/micro/micro_mutable_op_resolver.h b/tensorflow/lite/micro/micro_mutable_op_resolver.h
index 0c1426b..b314eb6 100644
--- a/tensorflow/lite/micro/micro_mutable_op_resolver.h
+++ b/tensorflow/lite/micro/micro_mutable_op_resolver.h
@@ -345,10 +345,8 @@
                       tflite::ops::micro::Register_RSQRT(), ParseRsqrt);
   }
 
-  TfLiteStatus AddShape(
-      const TfLiteRegistration& registration = Register_SHAPE()) {
-    return AddBuiltin(BuiltinOperator_SHAPE, tflite::Register_SHAPE(),
-                      ParseShape);
+  TfLiteStatus AddShape() {
+    return AddBuiltin(BuiltinOperator_SHAPE, Register_SHAPE(), ParseShape);
   }
 
   TfLiteStatus AddSin() {