diff --git a/liblog/include/android/log.h b/liblog/include/android/log.h
index 28c87e46d..52cbe8b71 100644
--- a/liblog/include/android/log.h
+++ b/liblog/include/android/log.h
@@ -34,6 +34,11 @@
  *   - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
  */
 
+/**
+ * @addtogroup Logging
+ * @{
+ */
+
 /**
  * \file
  *
@@ -205,4 +210,6 @@ int __android_log_buf_print(int bufID, int prio, const char* tag,
 }
 #endif
 
+/** @} */
+
 #endif /* _ANDROID_LOG_H */
diff --git a/libsync/include/ndk/sync.h b/libsync/include/ndk/sync.h
index 3c5578313..a786d3ef9 100644
--- a/libsync/include/ndk/sync.h
+++ b/libsync/include/ndk/sync.h
@@ -14,6 +14,15 @@
  *  limitations under the License.
  */
 
+/**
+ * @addtogroup Sync
+ * @{
+ */
+
+/**
+ * @file sync.h
+ */
+
 #ifndef ANDROID_SYNC_H
 #define ANDROID_SYNC_H
 
@@ -86,3 +95,5 @@ void sync_file_info_free(struct sync_file_info *info);
 __END_DECLS
 
 #endif /* ANDROID_SYNC_H */
+
+/** @} */