diff --git a/crypto/dh/dh.h b/crypto/dh/dh.h
index 5498a9dc1..a5bd9016a 100644
--- a/crypto/dh/dh.h
+++ b/crypto/dh/dh.h
@@ -174,7 +174,7 @@ struct dh_st {
 /* DH_check_pub_key error codes */
 # define DH_CHECK_PUBKEY_TOO_SMALL       0x01
 # define DH_CHECK_PUBKEY_TOO_LARGE       0x02
-# define DH_CHECK_PUBKEY_INVALID         0x03
+# define DH_CHECK_PUBKEY_INVALID         0x04
 
 /*
  * primes p where (p-1)/2 is prime too are called "safe"; we define this for