diff --git a/app/src/main/res/layout/main_numpad.xml b/app/src/main/res/layout/main_numpad.xml
index 2ea75b6a..3c7fada7 100644
--- a/app/src/main/res/layout/main_numpad.xml
+++ b/app/src/main/res/layout/main_numpad.xml
@@ -126,6 +126,7 @@
 				style="@style/numSeparator" />
 
 			<io.github.sspanak.tt9.ui.main.keys.SoftBackspaceKey
+				android:id="@+id/soft_key_backspace"
 				style="@android:style/Widget.Holo.Button.Borderless"
 				android:layout_width="0dp"
 				android:layout_height="match_parent"
@@ -202,6 +203,7 @@
 			tools:ignore="HardcodedText">
 
 			<io.github.sspanak.tt9.ui.main.keys.SoftKeyInputMode
+				android:id="@+id/soft_key_input_mode"
 				style="@android:style/Widget.Holo.Button.Borderless"
 				android:layout_width="0dp"
 				android:layout_height="match_parent"
@@ -301,6 +303,7 @@
 				style="@style/numSeparator" />
 
 			<io.github.sspanak.tt9.ui.main.keys.SoftOkKey
+				android:id="@+id/soft_key_ok"
 				style="@android:style/Widget.Holo.Button.Borderless"
 				android:layout_width="0dp"
 				android:layout_height="match_parent"