diff --git a/include/openssl/rsa.h b/include/openssl/rsa.h
index 51600c6..ed6df69 100644
--- a/include/openssl/rsa.h
+++ b/include/openssl/rsa.h
@@ -741,6 +741,7 @@
   // |blindings_inuse| from 0 to 1.
   BN_BLINDING **blindings;
   unsigned char *blindings_inuse;
+  uint64_t blinding_fork_generation;
 
   // private_key_frozen is one if the key has been used for a private key
   // operation and may no longer be mutated.