diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index d4a50b6..219e327 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -114,7 +114,7 @@
 
         <attr name="shadowColor" format="color" />
         <attr name="shadowRadius" format="float" />
-        <attr name="backgroundDimAmount" format="float" />
+        <attr name="backgroundDimAlpha" format="integer" />
 
         <attr name="keyTextStyle" format="enum">
             <!-- This should be aligned with Typeface.NORMAL etc. -->
diff --git a/java/res/values/styles.xml b/java/res/values/styles.xml
index eb2f9bb..4bc4ddb 100644
--- a/java/res/values/styles.xml
+++ b/java/res/values/styles.xml
@@ -65,7 +65,7 @@
         <item name="verticalCorrection">@dimen/keyboard_vertical_correction</item>
         <item name="shadowColor">#BB000000</item>
         <item name="shadowRadius">2.75</item>
-        <item name="backgroundDimAmount">0.5</item>
+        <item name="backgroundDimAlpha">128</item>
         <!-- Common attributes of LatinKeyboardView -->
         <item name="keyHysteresisDistance">@dimen/config_key_hysteresis_distance</item>
         <item name="touchNoiseThresholdTime">@integer/config_touch_noise_threshold_time</item>