diff --git a/worthless/installer.py b/worthless/installer.py
index f2c9ed4..3d46329 100644
--- a/worthless/installer.py
+++ b/worthless/installer.py
@@ -374,14 +374,14 @@ class Installer:
                 proc = await self._hdiffpatch.patch_file(old_file, old_file.with_suffix(old_suffix),
                                                          patch_path, wait=True)
                 patch_path.unlink()
-                if proc.returncode != 0:
-                    # Let the game download the file.
-                    print("Failed to patch {}, reverting and let the in-game updater do the job...".format(
-                        old_file.with_suffix(old_suffix))
-                    )
-                    await old_file.rename(old_file.with_suffix(old_suffix))
+                if proc.returncode == 0:
+                    await old_file.unlink()
                     return
-                await old_file.unlink()
+                # Let the game download the file.
+                print("Failed to patch {}, reverting and let the in-game updater do the job...".format(
+                    old_file.with_suffix(old_suffix))
+                )
+                await old_file.rename(old_file.with_suffix(old_suffix))
 
             files.remove(patch_file)
             patch_jobs.append(extract_and_patch(current_game_file, patch_file))