diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 1a68f8af5..d849a9106 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -786,7 +786,7 @@
     <string name="map_type_terrain">Terrain</string>
     <string name="map_type_hybrid">Hybrid</string>
     <string name="manage_map_layers">Manage Map Layers</string>
-    <string name="map_layer_formats">Custom layers support .kml or .kmz files.</string>
+    <string name="map_layer_formats">Custom layers support .kml, .kmz, or GeoJSON files.</string>
     <string name="map_layers_title">Map Layers</string>
     <string name="no_map_layers_loaded">No custom layers loaded.</string>
     <string name="add_layer_button">Add Layer</string>