1 files changed, 2 insertions, 1 deletions
diff --git a/it.class b/it.class
index c219f19..5b83317 100644
--- a/it.class
+++ b/it.class
@@ -704,7 +704,8 @@ static function shell_command($cmd, ...$args)
 		else
 		{
 			foreach ((array)$values[$key] as $value)
-				$parts[] = it::_exec_quotevalue($value, "cmd=$cmd key=$key val=$value");
+				if ($value !== false)
+					$parts[] = it::_exec_quotevalue($value, "cmd=$cmd key=$key val=$value");
 		}
 
 		$replacements[$tag] = implode(" ", $parts);