diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index bcfe025..d370892 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -2060,7 +2060,7 @@
 #else
     {
         ret = 1;
-        mbedtls_printf("MBEDTLS_CERTS_C not defined.");
+        mbedtls_printf( "MBEDTLS_CERTS_C not defined." );
     }
 #endif /* MBEDTLS_CERTS_C */
     if( ret < 0 )