diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index bc25b39..4a3f4a1 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -929,7 +929,7 @@
         return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
     }
 
-    MBEDTLS_SSL_DEBUG_MSG( 3, ( "trying ciphersuite: %04x (%s)",
+    MBEDTLS_SSL_DEBUG_MSG( 3, ( "trying ciphersuite: %#04x (%s)",
                                 suite_id, suite_info->name ) );
 
     if( suite_info->min_minor_ver > ssl->minor_ver ||