Have a look here, it describes how you solve it.
https://stackoverflow.com/a/26447144
The essential part is the following:
<style name="AppTheme" parent="Theme.AppCompat.Light">
<item name="drawerArrowStyle">@style/DrawerArrowStyle</item>
</style>
<style name="DrawerArrowStyle" parent="Widget.AppCompat.DrawerArrowToggle">
<item name="spinBars">true</item>
<item name="color">@android:color/white</item>
</style>