diff --git a/app/src/main/res/drawable/person.xml b/app/src/main/res/drawable/person.xml
new file mode 100644
index 0000000..db2bf2b
--- /dev/null
+++ b/app/src/main/res/drawable/person.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    osmdroid's MyLocationNewOverlay loads a drawable named "person" in its
+    constructor before OpenTopoMapViewer replaces it with ic_position.
+    Keep this as a text XML bitmap alias so the default lookup succeeds
+    without adding generated binary assets to the repository.
+-->
+<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
+    android:src="@drawable/ic_default_marker"
+    android:gravity="center" />
diff --git a/app/src/main/res/drawable/round_navigation_white_48.xml b/app/src/main/res/drawable/round_navigation_white_48.xml
new file mode 100644
index 0000000..317d82f
--- /dev/null
+++ b/app/src/main/res/drawable/round_navigation_white_48.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    osmdroid's MyLocationNewOverlay loads a drawable named
+    "round_navigation_white_48" in its constructor before OpenTopoMapViewer
+    replaces it with ic_direction. This XML bitmap alias avoids committing
+    binary fallback resources while still inflating as a BitmapDrawable.
+-->
+<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
+    android:src="@drawable/ic_default_marker"
+    android:gravity="center" />