diff --git a/images/php/fpm/entrypoints/60-php-xdebug.sh b/images/php/fpm/entrypoints/60-php-xdebug.sh
index ea34b44a65..36e38276cb 100755
--- a/images/php/fpm/entrypoints/60-php-xdebug.sh
+++ b/images/php/fpm/entrypoints/60-php-xdebug.sh
@@ -20,8 +20,8 @@ get_dockerhost() {
     return
   fi
 
-  # Fallback to localhost
-  echo "localhost"
+  # Fallback to default gateway (should work on Linux) see https://stackoverflow.com/questions/24319662/from-inside-of-a-docker-container-how-do-i-connect-to-the-localhost-of-the-mach
+  echo $(route -n | awk '/UG[ \t]/{print $2}')
   return
 }