diff --git a/Source/KeyHandler.mm b/Source/KeyHandler.mm
index 75489b66..1a00430f 100644
--- a/Source/KeyHandler.mm
+++ b/Source/KeyHandler.mm
@@ -484,7 +484,7 @@ static NSString *const kGraphVizOutputfile = @"/tmp/McBopomofo-visualization.dot
 
     // MARK: Enter
     if (charCode == 13) {
-        if ([input isControlHold]) {
+        if ([input isControlHold] && Preferences.controlEnterOutput != 0) {
             return [self _handleCtrlEnterWithState:state stateCallback:stateCallback errorCallback:errorCallback];
         }
         return [self _handleEnterWithState:state stateCallback:stateCallback errorCallback:errorCallback];
diff --git a/Source/Preferences.swift b/Source/Preferences.swift
index 53775ff2..d1f59f3b 100644
--- a/Source/Preferences.swift
+++ b/Source/Preferences.swift
@@ -47,6 +47,7 @@ private let kPhraseReplacementEnabledKey = "PhraseReplacementEnabled"
 private let kChineseConversionEngineKey = "ChineseConversionEngine"
 private let kChineseConversionStyleKey = "ChineseConversionStyle"
 private let kAssociatedPhrasesEnabledKey = "AssociatedPhrasesEnabled"
+private let kControlEnterOutputKey = "ControlEnterOutput"
 
 private let kDefaultCandidateListTextSize: CGFloat = 16
 private let kMinCandidateListTextSize: CGFloat = 12
@@ -383,4 +384,6 @@ class Preferences: NSObject {
         return associatedPhrasesEnabled
     }
 
+    @UserDefault(key: kControlEnterOutputKey, defaultValue: 0)
+    @objc static var controlEnterOutput: Int
 }