diff --git a/app/src/main/java/tu_darmstadt/sudoku/ui/view/SudokuButton.java b/app/src/main/java/tu_darmstadt/sudoku/ui/view/SudokuButton.java
index 1d8104e..9cb8c9e 100644
--- a/app/src/main/java/tu_darmstadt/sudoku/ui/view/SudokuButton.java
+++ b/app/src/main/java/tu_darmstadt/sudoku/ui/view/SudokuButton.java
@@ -17,7 +17,7 @@ public class SudokuButton extends Button {
     private SudokuButtonType type = SudokuButtonType.Unspecified;
 
     public SudokuButton(Context context, AttributeSet attrs) {
-        super(context, attrs,R.attr.borderlessButtonStyle);
+        super(context, attrs);
     }
 
     public void setValue(int value)             { this.value = value; }
diff --git a/app/src/main/res/layout/activity_main_menu.xml b/app/src/main/res/layout/activity_main_menu.xml
index 317ad3c..079c057 100644
--- a/app/src/main/res/layout/activity_main_menu.xml
+++ b/app/src/main/res/layout/activity_main_menu.xml
@@ -86,7 +86,7 @@
                 android:capitalize="none"
                 android:clickable="false"
                 android:elevation="10dp"
-                style="?android:attr/borderlessButtonStyle"/>
+                />
 
             <Button
                 android:layout_width="match_parent"
@@ -101,7 +101,7 @@
                 android:onClick="onClick"
                 android:capitalize="none"
                 android:clickable="false"
-                style="?android:attr/borderlessButtonStyle"/>
+                />
 
             <LinearLayout
                 android:layout_width="match_parent"
@@ -122,7 +122,7 @@
                     android:onClick="onClick"
                     android:capitalize="none"
                     android:clickable="false"
-                    style="?android:attr/borderlessButtonStyle"/>
+                    />
                 <Button
                     android:layout_width="0dp"
                     android:layout_height="match_parent"
@@ -136,7 +136,7 @@
                     android:onClick="onClick"
                     android:capitalize="none"
                     android:clickable="false"
-                    style="?android:attr/borderlessButtonStyle"/>
+                    />
             </LinearLayout>
             <LinearLayout
                 android:layout_width="match_parent"
@@ -157,7 +157,7 @@
                     android:onClick="onClick"
                     android:capitalize="none"
                     android:clickable="false"
-                    style="?android:attr/borderlessButtonStyle"/>
+                    />
                 <Button
                     android:layout_width="0dp"
                     android:layout_height="match_parent"
@@ -171,7 +171,7 @@
                     android:onClick="onClick"
                     android:capitalize="none"
                     android:clickable="false"
-                    style="?android:attr/borderlessButtonStyle"/>
+                    />
             </LinearLayout>
         </LinearLayout>