Corrected defaults.

Change-Id: I9ea50c75014cc03ac91fdef0f5b4fe11395f7074
diff --git a/tensorflow/lite/tools/versioning/op_version.cc b/tensorflow/lite/tools/versioning/op_version.cc
index 47ab610..f5efb06 100644
--- a/tensorflow/lite/tools/versioning/op_version.cc
+++ b/tensorflow/lite/tools/versioning/op_version.cc
@@ -688,7 +688,7 @@
 
     case BuiltinOperator_ADD: {
       auto add_option = op->builtin_options_as_AddOptions();
-      op_sig.options.addsub.pot_scale_int16 = false;
+      op_sig.options.addsub.pot_scale_int16 = true;
       if (add_option) {
         op_sig.options.addsub.pot_scale_int16 = add_option->pot_scale_int16();
       }
@@ -696,7 +696,7 @@
 
     case BuiltinOperator_SUB: {
       auto sub_option = op->builtin_options_as_SubOptions();
-      op_sig.options.addsub.pot_scale_int16 = false;
+      op_sig.options.addsub.pot_scale_int16 = true;
       op_sig.options.addsub.need_broadcast = false;
       op_sig.options.addsub.num_dims = 1;
       if (sub_option) {