diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h
index a17ff120..d567afd3 100644
--- a/lib/includes/nghttp2/nghttp2.h
+++ b/lib/includes/nghttp2/nghttp2.h
@@ -81,7 +81,7 @@ extern "C" {
 /**
  * @macro
  *
- * The seriazlied form of ALPN protocol identifier this library
+ * The serialized form of ALPN protocol identifier this library
  * supports.  Notice that first byte is the length of following
  * protocol identifier.  This is the same wire format of `TLS ALPN
  * extension <https://tools.ietf.org/html/rfc7301>`_.  This is useful