diff --git a/dev/SSCli.php b/dev/SSCli.php
index f0db50a2d..3704e6f73 100644
--- a/dev/SSCli.php
+++ b/dev/SSCli.php
@@ -7,7 +7,7 @@
 class SSCli extends Object {
 	static function supports_colour() {
 		if(!defined('STDOUT')) define('STDOUT', fopen("php://stdout","w"));
-		return posix_isatty(STDOUT);
+		return @posix_isatty(STDOUT);
 	}
 	
 	/**
@@ -52,4 +52,4 @@ class SSCli extends Object {
 	}
 }
 
-?>
\ No newline at end of file
+?>