diff --git a/plugins/php-apt/index.py b/plugins/php-apt/index.py
index 15b55f878..e407821b5 100755
--- a/plugins/php-apt/index.py
+++ b/plugins/php-apt/index.py
@@ -81,7 +81,7 @@ def status(version):
     # if data[0] == '':
     #     return 'stop'
     # return 'start'
-    sock_file = "/run/php/php${version}-fpm.sock"
+    sock_file = "/run/php/php{}-fpm.sock".format(version)
     if os.path.exists(sock_file):
         return 'start'
     return 'stop'