diff --git a/config.json.example b/config.json.example
index 0127798..730f3f7 100644
--- a/config.json.example
+++ b/config.json.example
@@ -9,7 +9,7 @@
 	// a list of associations
 	"mapping": [
 		
-		// local port 22 will be available as port 39999 on the above server
+		// port "local" will be available as port "remote" on the above server
 		{
 			"remote": 39999,
 			"local": 22
diff --git a/lib/safe-harbor.py b/lib/safe-harbor.py
index 3865997..944b79e 100755
--- a/lib/safe-harbor.py
+++ b/lib/safe-harbor.py
@@ -38,7 +38,7 @@ if __name__ == "__main__":
 		print("! unable to load any configuration")
 		sys.exit(1)
 	
-	command = ["/usr/bin/ssh", "-o", "ServerAliveInterval 45", "-o", "ServerAliveCountMax 2", "-o", "ExitOnForwardFailure yes", "-N", "-p", safe_get(cfg, "port", 22)]
+	command = ["/usr/bin/ssh", "-o", "ServerAliveInterval 45", "-o", "ServerAliveCountMax 2", "-o", "ExitOnForwardFailure yes", "-N", "-p", str(safe_get(cfg, "port", 22))]
 	
 	for m in cfg["mapping"]:
 		command.append("-R")