diff --git a/programs/pkey/dh_client.c b/programs/pkey/dh_client.c
index 34956b8..f06b906 100644
--- a/programs/pkey/dh_client.c
+++ b/programs/pkey/dh_client.c
@@ -205,8 +205,8 @@
 
     sha1( buf, (int)( p - 2 - buf ), hash );
 
-    if( ( ret = rsa_pkcs1_verify( &rsa, RSA_PUBLIC, POLARSSL_MD_SHA1,
-                                  0, hash, p ) ) != 0 )
+    if( ( ret = rsa_pkcs1_verify( &rsa, NULL, NULL, RSA_PUBLIC,
+                                  POLARSSL_MD_SHA1, 0, hash, p ) ) != 0 )
     {
         printf( " failed\n  ! rsa_pkcs1_verify returned %d\n\n", ret );
         goto exit;