diff --git a/xwords4/android/XWords4/res/layout/game_list_group.xml b/xwords4/android/XWords4/res/layout/game_list_group.xml
index 238813428..f41cc9152 100644
--- a/xwords4/android/XWords4/res/layout/game_list_group.xml
+++ b/xwords4/android/XWords4/res/layout/game_list_group.xml
@@ -21,9 +21,7 @@
               />
 
     <ImageButton android:id="@+id/expander"
-                 android:layout_width="32dp" 
-	             android:layout_height="32dp"
-                 android:src="@drawable/expander_ic_maximized"
+                 style="@style/expander_button"
                  />
 
 </org.eehouse.android.xw4.GameListGroup>
diff --git a/xwords4/android/XWords4/res/layout/game_list_item.xml b/xwords4/android/XWords4/res/layout/game_list_item.xml
index a0b283286..6aa2447a8 100644
--- a/xwords4/android/XWords4/res/layout/game_list_item.xml
+++ b/xwords4/android/XWords4/res/layout/game_list_item.xml
@@ -70,9 +70,7 @@
                      />
 
                 <ImageButton android:id="@+id/expander"
-                             android:layout_width="32dp" 
-	                         android:layout_height="32dp"
-                             android:src="@drawable/expander_ic_maximized"
+                             style="@style/expander_button"
                              />
 
             </LinearLayout>
diff --git a/xwords4/android/XWords4/res/values/styles.xml b/xwords4/android/XWords4/res/values/styles.xml
index 37e4666f3..bbea3719b 100644
--- a/xwords4/android/XWords4/res/values/styles.xml
+++ b/xwords4/android/XWords4/res/values/styles.xml
@@ -66,5 +66,11 @@
       <item name="android:layout_weight">1</item>
     </style>
 
+    <style name="expander_button">
+        <item name="android:layout_width">32dp</item>
+        <item name="android:layout_height">32dp</item>
+        <item name="android:src">@drawable/expander_ic_maximized</item>
+    </style>
+
 </resources>