diff --git a/README.md b/README.md
index 3044723..3b193ca 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,10 @@
     -> create folder "php" in ".ddev"-folder, create a file "xdebug.ini" (here could be also a php.ini - settings made override ddev php.ini) and insert this line into xdebug.ini: xdebug.client_host=docker.for.mac.localhost
         -> ddev restart afterwards
 
+    Xdebug: When one is not working, use the other.
+      xdebug.client_host=host.docker.internal
+      ;xdebug.client_host=docker.for.mac.localhost
+
 telnet: Unable to connect to remote host: Connection refused
 
 # PHPMyAdmin installieren: