diff --git a/src/net/torvald/terrarum/gamecontroller/IME.kt b/src/net/torvald/terrarum/gamecontroller/IME.kt
index e06fa5a4f..4c2e0619f 100644
--- a/src/net/torvald/terrarum/gamecontroller/IME.kt
+++ b/src/net/torvald/terrarum/gamecontroller/IME.kt
@@ -257,7 +257,7 @@ object IME {
                 { headkey, shifted, alted, lowLayerKeysym ->
                     val a = jsval.invokeMember("accept", headkey, shifted, alted, lowLayerKeysym)
 //                    println(a.getArrayElement(0).asString().map { it.code.toString(16) })
-                    a.getArrayElement(0).asString().toCanditates() to a.getArrayElement(1).asString()
+                    a.getArrayElement(0).asString().toCanditates() to a.getArrayElement(1).let { if (it.isNull) "" else it.asString() }
                 }, {
                     jsval.invokeMember("backspace").asString().toCanditates()
                 }, {
diff --git a/src/net/torvald/terrarum/gamecontroller/InputStrober.kt b/src/net/torvald/terrarum/gamecontroller/InputStrober.kt
index f20d42595..decfe425d 100644
--- a/src/net/torvald/terrarum/gamecontroller/InputStrober.kt
+++ b/src/net/torvald/terrarum/gamecontroller/InputStrober.kt
@@ -83,7 +83,7 @@ object InputStrober {
 
             if (!keyChanged) {
 //                println("KEY_DOWN '$keysym' ($headKeyCode) $repeatCount")
-                App.inputStrobed(TerrarumKeyboardEvent(KEY_DOWN, keysym, headKeyCode, repeatCount, keybuf))
+                App.inputStrobed(TerrarumKeyboardEvent(KEY_DOWN, keysym ?: "", headKeyCode, repeatCount, keybuf))
             }
             else if (newKeysym != null) {
 //                println("KEY_DOWC '$newKeysym' ($headKeyCode) $repeatCount")
@@ -159,7 +159,7 @@ object InputStrober {
 
 data class TerrarumKeyboardEvent(
         val type: Int,
-        val character: String?, // representative key symbol
+        val character: String, // representative key symbol
         val headkey: Int, // representative keycode
         val repeatCount: Int,
         val keycodes: IntArray
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIIMEConfig.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIIMEConfig.kt
index d57164203..2aac98f10 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIIMEConfig.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIIMEConfig.kt
@@ -453,7 +453,7 @@ open private class UIItemInputKeycap(
                 else if (parent.shiftin && keysym0[1]?.isNotEmpty() == true) keysym0[1]
                 else keysym0[0]) ?: keysymLow
 
-            if (keysym.isEmpty()) {
+            if (keysym.isEmpty() || keysym.length == 8 && keysym.contains("null")) {
                 return
             }