diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index c89cfd97f28..e3376356e71 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -199,7 +199,7 @@ 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='';
 		// '"' is dangerous because param in url can close the href= or src= and add javascript functions.