diff --git a/lib/vtls/axtls.c b/lib/vtls/axtls.c
index 1e511a2c7..bcfe62b4d 100644
--- a/lib/vtls/axtls.c
+++ b/lib/vtls/axtls.c
@@ -671,7 +671,7 @@ int Curl_axtls_random(struct SessionHandle *data,
      * race condition is that some global resources will leak. */
     RNG_initialize();
   }
-  get_random(length, entropy);
+  get_random((int)length, entropy);
   return 0;
 }