diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 7a049eab48..6ab25118f9 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -80,7 +80,7 @@
         that lie outside the length of the cue text.
 *   Metadata retriever:
     *   Parse Google Photos HEIC motion photos metadata.
-*   Media2 extention:
+*   Media2 extension:
     *   Notify onBufferingEnded when the state of origin player becomes
         STATE_IDLE or STATE_ENDED.
     *   Allow to remove all playlist items that makes the player reset.