diff --git a/vlib/gg/gg_android.c.v b/vlib/gg/gg_android.c.v
index 7c28932f31..d90216a589 100644
--- a/vlib/gg/gg_android.c.v
+++ b/vlib/gg/gg_android.c.v
@@ -11,8 +11,20 @@ fn C.AConfiguration_getDensity(voidptr) u32
 fn C.AConfiguration_delete(voidptr)
 
 struct C.AAssetManager {}
+
+// See https://developer.android.com/ndk/reference/struct/a-native-activity for more info.
 struct C.ANativeActivity {
-	assetManager voidptr
+pub:
+	assetManager     voidptr // Pointer to the Asset Manager instance for the application. (AAssetManager *)
+	callbacks        voidptr // Pointer to the callback function table of the native application. (struct ANativeActivityCallbacks *)
+	clazz            voidptr // The NativeActivity object handle.
+	env              voidptr // JNI context for the main thread of the app.
+	externalDataPath charptr // Path to this application's external (removable/mountable) data directory.
+	instance         voidptr // This is the native instance of the application.
+	internalDataPath charptr // Path to this application's internal data directory.
+	obbPath          charptr // Available starting with Honeycomb: path to the directory containing the application's OBB files (if any).
+	sdkVersion       int     // The platform's SDK version code.
+	vm               voidptr // The global handle on the process's Java VM
 }
 
 pub fn android_dpi_scale() f32 {