diff --git a/tl-parser.c b/tl-parser.c
index c98b009..a7ccf6b 100644
--- a/tl-parser.c
+++ b/tl-parser.c
@@ -2741,7 +2741,7 @@ void wstr (const char *s) {
       assert (0);
     }
     wdata (s, x);
-    x ++;
+    x ++; // The header, containing the length, which is 1 byte
     int t = 0;
     if (x & 3) {
       wdata (&t, 4 - (x & 3));
diff --git a/tl-tl.h b/tl-tl.h
index 9b6e8be..8bc0a70 100644
--- a/tl-tl.h
+++ b/tl-tl.h
@@ -25,6 +25,9 @@
 #ifndef __TL_TL_H__
 #define __TL_TL_H__
 
+// Current tl-tl schema is V2
+// See https://core.telegram.org/mtproto/TL-tl
+
 #define TLS_SCHEMA_V2 0x3a2f9be2
 #define TLS_TYPE 0x12eb4386
 #define TLS_COMBINATOR 0x5c0a1ed5