diff --git a/src/Syroot.Worms.Scratchpad/Program.cs b/src/Syroot.Worms.Scratchpad/Program.cs
index 1496b90..8e32b4d 100644
--- a/src/Syroot.Worms.Scratchpad/Program.cs
+++ b/src/Syroot.Worms.Scratchpad/Program.cs
@@ -37,7 +37,7 @@ namespace Syroot.Worms.Scratchpad
                 Directory.CreateDirectory(pngKsfFolder);
                 for (int i = 0; i < ksf.Images.Count; i++)
                 {
-                    string pngFileName = Path.ChangeExtension((i + 1).ToString(), "png");
+                    string pngFileName = Path.ChangeExtension(i.ToString(), "png");
                     Image image = ksf.Images[i];
                     if (image != null)
                         image.Save(Path.Combine(pngKsfFolder, pngFileName), ImageFormat.Png);