diff --git a/htdocs/lib/functions.lib.php b/htdocs/lib/functions.lib.php
index afdfe1e2ffe..6170443ad37 100644
--- a/htdocs/lib/functions.lib.php
+++ b/htdocs/lib/functions.lib.php
@@ -182,7 +182,7 @@ function GETPOST($paramname,$check='',$method=0)
     if (!empty($check))
     {
         // Check if numeric
-        if ($check == 'int' && ! preg_match('/^[\.,0-9]+$/i',trim($out))) $out='';
+        if ($check == 'int' && ! preg_match('/^[-\.,0-9]+$/i',trim($out))) $out='';
         // Check if alpha
         //if ($check == 'alpha' && ! preg_match('/^[ =:@#\/\\\(\)\-\._a-z0-9]+$/i',trim($out))) $out='';
         if ($check == 'alpha' && preg_match('/"/',trim($out))) $out='';    // Only " is dangerous because param in url can close the href= or src= and add javascript functions