diff --git a/android-app/src/main/res/values-v21/theme_material.xml b/android-app/src/main/res/values-v21/theme_material.xml
index 92055bbe..3ad7f061 100644
--- a/android-app/src/main/res/values-v21/theme_material.xml
+++ b/android-app/src/main/res/values-v21/theme_material.xml
@@ -24,18 +24,22 @@
 
 	<style name="material_digit_button_style" parent="cpp_keyboard_button_style">
 		<item name="android:background">@drawable/material_button_dark</item>
+		<item name="android:stateListAnimator">@null</item>
 	</style>
 
 	<style name="material_control_button_style" parent="metro_digit_button_style">
 		<item name="android:background">@drawable/material_button_dark</item>
+		<item name="android:stateListAnimator">@null</item>
 	</style>
 
 	<style name="material_operation_button_style" parent="material_digit_button_style">
 		<item name="android:background">@drawable/material_blue_button</item>
+		<item name="android:stateListAnimator">@null</item>
 	</style>
 
 	<style name="material_control_image_button_style" parent="material_control_button_style">
 		<item name="android:padding">6dp</item>
+		<item name="android:stateListAnimator">@null</item>
 	</style>
 
 	<style name="cpp_material_theme" parent="cpp_metro_blue_theme">