diff --git a/include/haproxy/h3.h b/include/haproxy/h3.h
index 8b91061cf..ec6da8a3f 100644
--- a/include/haproxy/h3.h
+++ b/include/haproxy/h3.h
@@ -27,7 +27,7 @@
 #include <haproxy/buf-t.h>
 #include <haproxy/mux_quic-t.h>
 
-/* H3 unidirecational stream types
+/* H3 unidirectional stream types
  * Emitted as the first byte on the stream to differentiate it.
  */
 #define H3_UNI_S_T_CTRL       0x00