Index: src/main/command.c
--- src/main/command.c.orig
+++ src/main/command.c
@@ -2727,11 +2727,11 @@ static int command_stats_pool(rad_listen_t *listener, 
 		return CMD_FAIL;
 	}
 
-	cprintf(listener, "last_checked\t\t%zu\n", stats->last_checked);
-	cprintf(listener, "last_opened\t\t%zu\n", stats->last_opened);
-	cprintf(listener, "last_closed\t\t%zu\n", stats->last_closed);
-	cprintf(listener, "last_failed\t\t%zu\n", stats->last_failed);
-	cprintf(listener, "last_throttled\t\t%zu\n", stats->last_throttled);
+	cprintf(listener, "last_checked\t\t%" PRIu64 "\n", (long long)stats->last_checked);
+	cprintf(listener, "last_opened\t\t%" PRIu64 "\n", (long long)stats->last_opened);
+	cprintf(listener, "last_closed\t\t%" PRIu64 "\n", (long long)stats->last_closed);
+	cprintf(listener, "last_failed\t\t%" PRIu64 "\n", (long long)stats->last_failed);
+	cprintf(listener, "last_throttled\t\t%" PRIu64 "\n", (long long)stats->last_throttled);
 	cprintf(listener, "total_opened\t\t%" PRIu64 "\n", stats->opened);
 	cprintf(listener, "total_closed\t\t%" PRIu64 "\n", stats->closed);
 	cprintf(listener, "total_failed\t\t%" PRIu64 "\n", stats->failed);
