diff --git a/include/android/multinetwork.h b/include/android/multinetwork.h
index 97892f8..5f2a57f 100644
--- a/include/android/multinetwork.h
+++ b/include/android/multinetwork.h
@@ -14,6 +14,15 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Networking
+ * @{
+ */
+
+/**
+ * @file multinetwork.h
+ */
+
 #ifndef ANDROID_MULTINETWORK_H
 #define ANDROID_MULTINETWORK_H
 
@@ -104,3 +113,5 @@
 __END_DECLS
 
 #endif  // ANDROID_MULTINETWORK_H
+
+/** @} */
diff --git a/include/android/trace.h b/include/android/trace.h
index d3b1fb6..d9e5d88 100644
--- a/include/android/trace.h
+++ b/include/android/trace.h
@@ -15,6 +15,11 @@
  */
 
 /**
+ * @addtogroup Tracing
+ * @{
+ */
+
+/**
  * @file trace.h
  * @brief Writes trace events to the system trace buffer.
  *
@@ -65,3 +70,5 @@
 #endif
 
 #endif // ANDROID_NATIVE_TRACE_H
+
+/** @} */
diff --git a/libs/nativewindow/include/android/hardware_buffer.h b/libs/nativewindow/include/android/hardware_buffer.h
index 52440a5..ef4875a 100644
--- a/libs/nativewindow/include/android/hardware_buffer.h
+++ b/libs/nativewindow/include/android/hardware_buffer.h
@@ -15,6 +15,11 @@
  */
 
 /**
+ * @addtogroup NativeActivity Native Activity
+ * @{
+ */
+
+/**
  * @file hardware_buffer.h
  */
 
@@ -244,3 +249,5 @@
 __END_DECLS
 
 #endif // ANDROID_HARDWARE_BUFFER_H
+
+/** @} */