diff --git a/Source/Modules/ControllerModules/IMEState.swift b/Source/Modules/ControllerModules/IMEState.swift
index a8d732e1..ba950e97 100644
--- a/Source/Modules/ControllerModules/IMEState.swift
+++ b/Source/Modules/ControllerModules/IMEState.swift
@@ -35,6 +35,7 @@ public protocol IMEStateProtocol {
   var attributedString: NSAttributedString { get }
   var convertedToInputting: IMEState { get }
   var isFilterable: Bool { get }
+  var isMarkedLengthValid: Bool { get }
   var node: SymbolNode { get set }
 }
 
@@ -154,6 +155,7 @@ extension IMEState {
 
 extension IMEState {
   public var isFilterable: Bool { data.isFilterable }
+  public var isMarkedLengthValid: Bool { data.isMarkedLengthValid }
   public var candidates: [(String, String)] { data.candidates }
   public var convertedToInputting: IMEState {
     if type == .ofInputting { return self }
diff --git a/Source/Modules/ControllerModules/IMEStateData.swift b/Source/Modules/ControllerModules/IMEStateData.swift
index 4e35d393..95ca5b66 100644
--- a/Source/Modules/ControllerModules/IMEStateData.swift
+++ b/Source/Modules/ControllerModules/IMEStateData.swift
@@ -76,7 +76,11 @@ public struct StateData {
     ]
   )
   var isFilterable: Bool {
-    markedTargetExists ? mgrPrefs.allowedMarkLengthRange.contains(markedRange.count) : false
+    markedTargetExists ? isMarkedLengthValid : false
+  }
+
+  var isMarkedLengthValid: Bool {
+    mgrPrefs.allowedMarkLengthRange.contains(markedRange.count)
   }
 
   var attributedStringNormal: NSAttributedString {
diff --git a/Source/Modules/ControllerModules/KeyHandler_States.swift b/Source/Modules/ControllerModules/KeyHandler_States.swift
index 53128eb1..0f54b7eb 100644
--- a/Source/Modules/ControllerModules/KeyHandler_States.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_States.swift
@@ -161,7 +161,13 @@ extension KeyHandler {
           IME.prtDebugIntel("2EAC1F7A")
           errorCallback()
           return true
-        } else if !keyHandlerDelegate.keyHandler(self, didRequestWriteUserPhraseWith: state, addToFilter: false) {
+        }
+        if !state.isMarkedLengthValid {
+          IME.prtDebugIntel("9AAFAC00")
+          errorCallback()
+          return true
+        }
+        if !keyHandlerDelegate.keyHandler(self, didRequestWriteUserPhraseWith: state, addToFilter: false) {
           IME.prtDebugIntel("5B69CC8D")
           errorCallback()
           return true