1 files changed, 1 insertions, 1 deletions
diff --git a/spawn.c b/spawn.c
index e7ccfe0f..12409975 100644
--- a/spawn.c
+++ b/spawn.c
@@ -327,7 +327,7 @@ spawn_pane(struct spawn_context *sc, char **cause)
 	}
 	if (cwd != NULL)
 		log_debug("%s: cwd=%s", __func__, cwd);
-	cmd_log_argv(new_wp->argc, new_wp->argv, __func__);
+	cmd_log_argv(new_wp->argc, new_wp->argv, "%s", __func__);
 	environ_log(child, "%s: environment ", __func__);
 
 	/* If the command is empty, don't fork a child process. */