diff --git a/modules/examples/mod_example_ipc.c b/modules/examples/mod_example_ipc.c
index f540ec4043..cf5353f6fc 100644
--- a/modules/examples/mod_example_ipc.c
+++ b/modules/examples/mod_example_ipc.c
@@ -315,8 +315,8 @@ static int exipc_handler(request_rec *r)
          */
         timecamped += CAMPOUT;
         ap_log_error(APLOG_MARK, APLOG_NOERRNO | APLOG_NOTICE, 
-                     0, r->server, "Child %ld camping out on mutex for %d " 
-                     "microseconds",
+                     0, r->server, "Child %ld camping out on mutex for %" APR_INT64_T_FMT
+                     " microseconds",
                      (long int) getpid(), timecamped);
     } /* Lock acquisition loop */