diff --git a/Calculator/src/main/res/values/styles.xml b/Calculator/src/main/res/values/styles.xml
index ba0803348..e96bc219a 100644
--- a/Calculator/src/main/res/values/styles.xml
+++ b/Calculator/src/main/res/values/styles.xml
@@ -63,6 +63,7 @@
         <item name="android:layout_weight">1</item>
         <item name="android:focusable">true</item>
         <item name="themeBackground">@drawable/btn_function</item>
+        <item name="font">btn_font</item>
         <item name="android:layout_marginLeft">1dp</item>
         <item name="textColor">@color/function_text_color</item>
         <item name="textColorHint">@color/button_hint_text</item>