diff --git a/libc/include/android/api-level.h b/libc/include/android/api-level.h
index 7e3aa99..18825e7 100644
--- a/libc/include/android/api-level.h
+++ b/libc/include/android/api-level.h
@@ -57,5 +57,6 @@
 #define __ANDROID_API_N__ 24
 #define __ANDROID_API_N_MR1__ 25
 #define __ANDROID_API_O__ 26
+#define __ANDROID_API_O_MR1__ 27
 
 #endif /* ANDROID_API_LEVEL_H */