diff --git a/base/include/android-base/mapped_file.h b/base/include/android-base/mapped_file.h
index b71964655..2ab49ab1f 100644
--- a/base/include/android-base/mapped_file.h
+++ b/base/include/android-base/mapped_file.h
@@ -36,7 +36,7 @@ namespace android {
 namespace base {
 
 /**
- * A region of a file mapped into memory.
+ * A region of a file mapped into memory, also known as MmapFile.
  */
 class MappedFile {
  public: