diff --git a/src/class/hid/hid_host.c b/src/class/hid/hid_host.c
index 0fbb97c53..56fccdd22 100644
--- a/src/class/hid/hid_host.c
+++ b/src/class/hid/hid_host.c
@@ -664,7 +664,7 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info_arr,
     uint8_t const type = header.type;
     uint8_t size = header.size;
     if (size == 3) {
-      size = 4;
+      size = 4; // HID 1.11 6.2.2.2 3 is 4 bytes
     }
 
     uint8_t const data8 = (size > 0) ? desc_report[0] : 0;