diff --git a/job.c b/job.c
index 37c9c453..66315bd2 100644
--- a/job.c
+++ b/job.c
@@ -80,7 +80,7 @@ job_run(const char *cmd, struct session *s, const char *cwd,
 
 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, out) != 0)
 		return (NULL);
-	log_debug("%s: cmd=%s, cwd=%s", __func__, cmd, cwd);
+	log_debug("%s: cmd=%s, cwd=%s", __func__, cmd, cwd == NULL ? "" : cwd);
 
 	/*
 	 * Do not set TERM during .tmux.conf, it is nice to be able to use