diff --git a/programs/ssl/dtls_server.c b/programs/ssl/dtls_server.c
index 6ad4e66..e19ab80 100644
--- a/programs/ssl/dtls_server.c
+++ b/programs/ssl/dtls_server.c
@@ -206,7 +206,7 @@
         goto exit;
     }
 
-    mbedtls_ssl_set_rng( &ssl, mbedtls_ctr_drbg_random, &ctr_drbg );
+    mbedtls_ssl_set_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
     mbedtls_ssl_set_dbg( &conf, my_debug, stdout );
 
 #if defined(MBEDTLS_SSL_CACHE_C)