diff --git a/Source/Modules/ControllerModules/KeyHandler_States.swift b/Source/Modules/ControllerModules/KeyHandler_States.swift
index 2d7f8cfd..e5e473be 100644
--- a/Source/Modules/ControllerModules/KeyHandler_States.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_States.swift
@@ -376,7 +376,7 @@ extension KeyHandler {
         walk()
         let inputting = buildInputtingState()
         // 這裡不用「count > 0」，因為該整數變數只要「!isEmpty」那就必定滿足這個條件。
-        if !inputting.composingBuffer.isEmpty {
+        if inputting.composingBuffer.isEmpty {
           stateCallback(InputState.EmptyIgnoringPreviousState())
         } else {
           stateCallback(inputting)