diff --git a/doc/PROTOCOL-HTTP2.md b/doc/PROTOCOL-HTTP2.md
index 107a8e88242..bdd00ca3632 100644
--- a/doc/PROTOCOL-HTTP2.md
+++ b/doc/PROTOCOL-HTTP2.md
@@ -191,7 +191,7 @@ grpc-java-android/0.9.1 (gingerbread/1.2.4; nexus5; tmobile)
 Unless explicitly defined to be, gRPC Calls are not assumed to be idempotent.  Specifically:
 
 * Calls that cannot be proven to have started will not be retried.
-* There is no mechanisim for duplicate suppression as it is not necessary.
+* There is no mechanism for duplicate suppression as it is not necessary.
 * Calls that are marked as idempotent may be sent multiple times.