diff --git a/java/res/values/keycodes.xml b/java/res/values/keycodes.xml
index 4f8bfed..b3f71d2 100644
--- a/java/res/values/keycodes.xml
+++ b/java/res/values/keycodes.xml
@@ -23,10 +23,12 @@
     <integer name="key_tab">9</integer>
     <integer name="key_return">10</integer>
     <integer name="key_space">32</integer>
-    <integer name="key_dummy">0</integer>
     <integer name="key_shift">-1</integer>
     <integer name="key_switch_alpha_symbol">-2</integer>
+    <integer name="key_capslock">-3</integer>
+    <integer name="key_output_text">-4</integer>
     <integer name="key_delete">-5</integer>
     <integer name="key_settings">-6</integer>
     <integer name="key_shortcut">-7</integer>
+    <integer name="key_unspecified">-9</integer>
 </resources>
diff --git a/java/res/xml-sw600dp/kbd_key_styles.xml b/java/res/xml-sw600dp/kbd_key_styles.xml
index 1dd0307..ab90c98 100644
--- a/java/res/xml-sw600dp/kbd_key_styles.xml
+++ b/java/res/xml-sw600dp/kbd_key_styles.xml
@@ -78,14 +78,12 @@
         latin:keyIcon="iconShortcutKey"
         latin:keyIconDisabled="iconDisabledShortcutKey"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping"
-        latin:altCode="@integer/key_dummy"
         latin:parentStyle="f2PopupStyle" />
     <key-style
         latin:styleName="settingsKeyStyle"
         latin:code="@integer/key_settings"
         latin:keyIcon="iconSettingsKey"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping"
-        latin:altCode="@integer/key_dummy"
         latin:backgroundType="functional" />
     <key-style
         latin:styleName="tabKeyStyle"
diff --git a/java/res/xml-sw768dp/kbd_key_styles.xml b/java/res/xml-sw768dp/kbd_key_styles.xml
index 7292fe1..72a1a4c 100644
--- a/java/res/xml-sw768dp/kbd_key_styles.xml
+++ b/java/res/xml-sw768dp/kbd_key_styles.xml
@@ -60,14 +60,12 @@
         latin:keyIcon="iconShortcutKey"
         latin:keyIconDisabled="iconDisabledShortcutKey"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping"
-        latin:altCode="@integer/key_dummy"
         latin:backgroundType="functional" />
     <key-style
         latin:styleName="settingsKeyStyle"
         latin:code="@integer/key_settings"
         latin:keyIcon="iconSettingsKey"
         latin:keyActionFlags="noKeyPreview|altCodeWhileTyping"
-        latin:altCode="@integer/key_dummy"
         latin:backgroundType="functional" />
     <key-style
         latin:styleName="tabKeyStyle"
diff --git a/java/res/xml/kbd_settings_or_tab.xml b/java/res/xml/kbd_settings_or_tab.xml
index b947d18..2d35e3b 100644
--- a/java/res/xml/kbd_settings_or_tab.xml
+++ b/java/res/xml/kbd_settings_or_tab.xml
@@ -26,10 +26,10 @@
             latin:hasSettingsKey="true"
         >
             <!-- Because this settings key is not adjacent to the space key, this key should be
-                 just ignored while typing (altCode=CODE_DUMMY). -->
+                 just ignored while typing (altCode=CODE_UNSPECIFIED). -->
             <Key
                 latin:keyStyle="settingsKeyStyle"
-                latin:altCode="@integer/key_dummy"
+                latin:altCode="@integer/key_unspecified"
                 latin:keyWidth="9.2%p" />
         </case>
         <!-- hasSettingsKey="false" -->