diff --git a/lib/ace/keyboard/textinput.js b/lib/ace/keyboard/textinput.js
index 36f89985..eb27026a 100644
--- a/lib/ace/keyboard/textinput.js
+++ b/lib/ace/keyboard/textinput.js
@@ -355,7 +355,7 @@ var TextInput = function(parentNode, host) {
 
     // COMPOSITION
     var onCompositionStart = function(e) {
-        if (inComposition) return;
+        if (inComposition || !host.onCompositionStart) return;
         // console.log("onCompositionStart", inComposition)
         inComposition = {};
         host.onCompositionStart();
@@ -371,7 +371,7 @@ var TextInput = function(parentNode, host) {
 
     var onCompositionUpdate = function() {
         // console.log("onCompositionUpdate", inComposition && JSON.stringify(text.value))
-        if (!inComposition) return;
+        if (!inComposition || !host.onCompositionUpdate) return;
         var val = text.value.replace(/\x01/g, "");
         if (inComposition.lastValue === val) return;
         
@@ -390,6 +390,7 @@ var TextInput = function(parentNode, host) {
     };
 
     var onCompositionEnd = function(e) {
+        if (!host.onCompositionEnd) return;
         // console.log("onCompositionEnd", inComposition &&inComposition.lastValue)
         var c = inComposition;
         inComposition = false;