diff --git a/include/openssl/base.h b/include/openssl/base.h
index 604bd969..47b3ccb9 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -108,6 +108,7 @@ extern "C" {
 #endif
 
 #define OPENSSL_IS_BORINGSSL
+#define BORINGSSL_201510
 #define OPENSSL_VERSION_NUMBER 0x10002000
 #define SSLEAY_VERSION_NUMBER OPENSSL_VERSION_NUMBER