1 files changed, 2 insertions, 2 deletions

diff --git a/src/transport/test_transport_ats.c b/src/transport/test_transport_ats.c
index a23b7afe1..08f38398e 100644
--- a/src/transport/test_transport_ats.c
+++ b/src/transport/test_transport_ats.c
@@ -267,11 +267,11 @@ static void evaluate_measurements()
         
         if (machine_parsable)
           fprintf (stderr,
-                   "peers,%i,mechs,%lu,"
+                   "peers,%i,mechs,%llu,"
                    "new,%i,%f,%f,"
                    "mod,%i,%f,%f,"
                    "unmod,%i,%f,%f\n",
-                   peers-1, results_unmodified[0].mechs,
+                   peers-1, (unsigned long long) results_unmodified[0].mechs,
                    c_new, average[0], stddev[0],
                    c_modified, average[1], stddev[1],
                    c_unmodified, average[2], stddev[2]);