diff --git a/QOIDecoder/DecoderProgram.cs b/QOIDecoder/DecoderProgram.cs
index ec31c10..18e0637 100644
--- a/QOIDecoder/DecoderProgram.cs
+++ b/QOIDecoder/DecoderProgram.cs
@@ -32,7 +32,7 @@ static void Main(string[] args)
                 {
                     if (arg.StartsWith('-'))
                     {
-                        foreach (char opt in args[0].Substring(1))
+                        foreach (char opt in arg.Substring(1))
                         {
                             if (opt == 'h')
                             {