diff --git a/IPA/PatchContext.cs b/IPA/PatchContext.cs
index f3efb05..fc9dac9 100644
--- a/IPA/PatchContext.cs
+++ b/IPA/PatchContext.cs
@@ -49,7 +49,7 @@ namespace IPA
             context.ProjectName = Path.GetFileNameWithoutExtension(context.Executable);
             context.DataPathDst = Path.Combine(context.ProjectRoot, context.ProjectName + "_Data");
             context.ManagedPath = Path.Combine(context.DataPathDst, "Managed");
-            context.EngineFile =  DetermineEngineFile(context.ManagedPath, "UnityEngine.dll", "UnityEngine.CoreModule.dll");
+            context.EngineFile =  DetermineEngineFile(context.ManagedPath, "UnityEngine.CoreModule.dll", "UnityEngine.dll");
             context.AssemblyFile = Path.Combine(context.ManagedPath, "Assembly-Csharp.dll");
             context.BackupPath = Path.Combine(Path.Combine(context.IPARoot, "Backups"), context.ProjectName);
             context.ShortcutPath = Path.Combine(context.ProjectRoot, $"{context.ProjectName} (Patch & Launch)") + ".lnk";