diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 98f8528..2933ab3 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -1330,7 +1330,7 @@
 
     len = mbedtls_snprintf( (char *) buf, sizeof(buf) - 1, GET_REQUEST,
                     opt.request_page );
-    tail_len = strlen( GET_REQUEST_END );
+    tail_len = (int) strlen( GET_REQUEST_END );
 
     /* Add padding to GET request to reach opt.request_size in length */
     if( opt.request_size != DFL_REQUEST_SIZE &&