diff --git a/lib/nghttp2-1.62.1/lib/includes/nghttp2/nghttp2.h b/lib/nghttp2-1.62.1/lib/includes/nghttp2/nghttp2.h
index 92c3ccc6e48..cc402af7b30 100644
--- a/lib/nghttp2-1.62.1/lib/includes/nghttp2/nghttp2.h
+++ b/lib/nghttp2-1.62.1/lib/includes/nghttp2/nghttp2.h
@@ -972,7 +972,7 @@ typedef enum {
  * Returning :enum:`nghttp2_error.NGHTTP2_ERR_CALLBACK_FAILURE` will
  * signal the entire session failure.
  */
-typedef ssize_t (*nghttp2_data_source_read_callback)(
+typedef nghttp2_ssize (*nghttp2_data_source_read_callback)(
     nghttp2_session *session, int32_t stream_id, uint8_t *buf, size_t length,
     uint32_t *data_flags, nghttp2_data_source *source, void *user_data);