diff --git a/build.gradle b/build.gradle
index 7617f342..b36a858d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,7 +2,7 @@ buildscript {
 
     ext.min_sdk_version = 21
     ext.target_sdk_version = 'S'
-    ext.compile_sdk_version = 'android-S' // "sdk/platforms/android-S" を参照するため
+    ext.compile_sdk_version = 'android-S'
 
     ext.appcompat_version='1.2.0'