diff --git a/api/current.txt b/api/current.txt
index 24ab586..a21d85f 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -30620,7 +30620,7 @@
     field public static final int N = 24; // 0x18
     field public static final int N_MR1 = 25; // 0x19
     field public static final int O = 26; // 0x1a
-    field public static final int O_MR1 = 10000; // 0x2710
+    field public static final int O_MR1 = 27; // 0x1b
   }
 
   public final class Bundle extends android.os.BaseBundle implements java.lang.Cloneable android.os.Parcelable {
diff --git a/api/system-current.txt b/api/system-current.txt
index 9963268..1182db4 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -33333,7 +33333,7 @@
     field public static final int N = 24; // 0x18
     field public static final int N_MR1 = 25; // 0x19
     field public static final int O = 26; // 0x1a
-    field public static final int O_MR1 = 10000; // 0x2710
+    field public static final int O_MR1 = 27; // 0x1b
   }
 
   public final class Bundle extends android.os.BaseBundle implements java.lang.Cloneable android.os.Parcelable {
diff --git a/api/test-current.txt b/api/test-current.txt
index 343228a..e2617c9 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -30764,7 +30764,7 @@
     field public static final int N = 24; // 0x18
     field public static final int N_MR1 = 25; // 0x19
     field public static final int O = 26; // 0x1a
-    field public static final int O_MR1 = 10000; // 0x2710
+    field public static final int O_MR1 = 27; // 0x1b
   }
 
   public final class Bundle extends android.os.BaseBundle implements java.lang.Cloneable android.os.Parcelable {
diff --git a/core/java/android/os/Build.java b/core/java/android/os/Build.java
index 7852125..0627998 100644
--- a/core/java/android/os/Build.java
+++ b/core/java/android/os/Build.java
@@ -773,7 +773,7 @@
         /**
          * O MR1.
          */
-        public static final int O_MR1 = CUR_DEVELOPMENT; // STOPSHIP Replace with the real version.
+        public static final int O_MR1 = 27;
     }
 
     /** The type of build, like "user" or "eng". */
diff --git a/tools/aapt/SdkConstants.h b/tools/aapt/SdkConstants.h
index 0dbf4ee..bf56ec0 100644
--- a/tools/aapt/SdkConstants.h
+++ b/tools/aapt/SdkConstants.h
@@ -42,7 +42,7 @@
     SDK_NOUGAT = 24,
     SDK_NOUGAT_MR1 = 25,
     SDK_O = 26,
-    SDK_O_MR1 = 10000, // STOPSHIP Replace with the real version.
+    SDK_O_MR1 = 27,
 };
 
 #endif // H_AAPT_SDK_CONSTANTS
diff --git a/tools/aapt2/SdkConstants.h b/tools/aapt2/SdkConstants.h
index 864e57d..5c32ed4 100644
--- a/tools/aapt2/SdkConstants.h
+++ b/tools/aapt2/SdkConstants.h
@@ -52,7 +52,7 @@
   SDK_NOUGAT = 24,
   SDK_NOUGAT_MR1 = 25,
   SDK_O = 26,
-  SDK_O_MR1 = 10000, // STOPSHIP Replace with the real version.
+  SDK_O_MR1 = 27,
 };
 
 ApiVersion FindAttributeSdkLevel(const ResourceId& id);