diff --git a/plugins/php/conf/php5.ini b/plugins/php/conf/php5.ini
index 06a9522ba..04c2dc42c 100644
--- a/plugins/php/conf/php5.ini
+++ b/plugins/php/conf/php5.ini
@@ -46,7 +46,7 @@ allow_url_fopen = On
 allow_url_include = Off
 default_socket_timeout = 60
 
-disable_functions = exec,passthru,shell_exec,system,proc_open,popen,parse_ini_file,show_source
+disable_functions = exec,passthru,shell_exec,system,popen,parse_ini_file,show_source
 
 [CLI Server]
 cli_server.color = On