diff --git a/src/addoncreator/Addon.cs b/src/addoncreator/Addon.cs
index 64b708e..113b359 100644
--- a/src/addoncreator/Addon.cs
+++ b/src/addoncreator/Addon.cs
@@ -200,6 +200,7 @@ namespace GarrysMod.AddonCreator
 
                 using (var outfile = File.Create(path))
                 {
+                    stream.Position = 0;
                     stream.CopyTo(outfile);
                 }
             }