diff --git a/Source/Modules/WindowControllers/CtlRevLookupWindow.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/RevLookupUI/CtlRevLookupWindow.swift
similarity index 99%
rename from Source/Modules/WindowControllers/CtlRevLookupWindow.swift
rename to Packages/vChewing_MainAssembly/Sources/MainAssembly/RevLookupUI/CtlRevLookupWindow.swift
index af38cf70..4212b326 100644
--- a/Source/Modules/WindowControllers/CtlRevLookupWindow.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/RevLookupUI/CtlRevLookupWindow.swift
@@ -8,7 +8,6 @@
 
 import AppKit
 import LangModelAssembly
-import MainAssembly
 import Shared
 
 class CtlRevLookupWindow: NSWindowController, NSWindowDelegate {
diff --git a/vChewing.xcodeproj/project.pbxproj b/vChewing.xcodeproj/project.pbxproj
index df73e95a..312eaa5e 100644
--- a/vChewing.xcodeproj/project.pbxproj
+++ b/vChewing.xcodeproj/project.pbxproj
@@ -9,7 +9,6 @@
 /* Begin PBXBuildFile section */
 		5B09307628B6FC3B0021F8C5 /* shortcuts.html in Resources */ = {isa = PBXBuildFile; fileRef = 5B09307828B6FC3B0021F8C5 /* shortcuts.html */; };
 		5B2CA1E62B130869002634EE /* vChewingFactoryDatabase.sqlite in Resources */ = {isa = PBXBuildFile; fileRef = 5B2CA1E52B130869002634EE /* vChewingFactoryDatabase.sqlite */; };
-		5B30BF282944867800BD87A9 /* CtlRevLookupWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5B30BF272944867800BD87A9 /* CtlRevLookupWindow.swift */; };
 		5B40113928D7050D00A9D4CB /* Shared in Frameworks */ = {isa = PBXBuildFile; productRef = 5B40113828D7050D00A9D4CB /* Shared */; };
 		5B40113C28D71C0100A9D4CB /* Uninstaller in Frameworks */ = {isa = PBXBuildFile; productRef = 5B40113B28D71C0100A9D4CB /* Uninstaller */; };
 		5B65FB342A9518DA007EEFB0 /* MainAssembly in Frameworks */ = {isa = PBXBuildFile; productRef = 5B65FB332A9518DA007EEFB0 /* MainAssembly */; };
@@ -118,7 +117,6 @@
 		5B20430B28BEFC0C00BFC6FD /* vChewing.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = vChewing.entitlements; sourceTree = "<group>"; };
 		5B2CA1E52B130869002634EE /* vChewingFactoryDatabase.sqlite */ = {isa = PBXFileReference; lastKnownFileType = file; name = vChewingFactoryDatabase.sqlite; path = Data/Build/Release/vChewingFactoryDatabase.sqlite; sourceTree = "<group>"; };
 		5B2DB17127AF8771006D874E /* Makefile */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.make; name = Makefile; path = Data/Makefile; sourceTree = "<group>"; };
-		5B30BF272944867800BD87A9 /* CtlRevLookupWindow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CtlRevLookupWindow.swift; sourceTree = "<group>"; };
 		5B30F11227BA568800484E24 /* vChewingKeyLayout.bundle */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.plug-in"; path = vChewingKeyLayout.bundle; sourceTree = "<group>"; };
 		5B312684287800DE001AA720 /* FAQ.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = FAQ.md; sourceTree = "<group>"; };
 		5B40113A28D71B8700A9D4CB /* vChewing_Uninstaller */ = {isa = PBXFileReference; lastKnownFileType = wrapper; name = vChewing_Uninstaller; path = Packages/vChewing_Uninstaller; sourceTree = "<group>"; };
@@ -286,14 +284,6 @@
 			path = Resources;
 			sourceTree = "<group>";
 		};
-		5B62A33A27AE7C7500A19448 /* WindowControllers */ = {
-			isa = PBXGroup;
-			children = (
-				5B30BF272944867800BD87A9 /* CtlRevLookupWindow.swift */,
-			);
-			path = WindowControllers;
-			sourceTree = "<group>";
-		};
 		5B62A33B27AE7C7F00A19448 /* WindowNIBs */ = {
 			isa = PBXGroup;
 			children = (
@@ -438,7 +428,6 @@
 		6A0D4F1215FC0EB100ABF4B3 /* Modules */ = {
 			isa = PBXGroup;
 			children = (
-				5B62A33A27AE7C7500A19448 /* WindowControllers */,
 				D427F76B278CA1BA004A2160 /* AppDelegateImpl.swift */,
 				D47B92BF27972AC800458394 /* main.swift */,
 				5BB802D927FABA8300CF1C19 /* SessionCtl_Menu.swift */,
@@ -720,7 +709,6 @@
 			files = (
 				D427F76C278CA2B0004A2160 /* AppDelegateImpl.swift in Sources */,
 				D47B92C027972AD100458394 /* main.swift in Sources */,
-				5B30BF282944867800BD87A9 /* CtlRevLookupWindow.swift in Sources */,
 				5BB802DA27FABA8300CF1C19 /* SessionCtl_Menu.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;