diff --git a/src/ziplist.c b/src/ziplist.c
index a2c0edb3a1cf74c088c6f7e2b8e46959e7695d45..81eec18a3782a8f18ea2f379978ec52c75f4ce7f 100644
--- a/src/ziplist.c
+++ b/src/ziplist.c
@@ -58,6 +58,10 @@
  *      Integer encoded as int32_t (4 bytes).
  * |1110____| - 1 byte
  *      Integer encoded as int64_t (8 bytes).
+ * |1111____| - 1 byte
+ *      Integer encoded as 24 bit signed (3 bytes).
+ *
+ * All the integers are represented in little endian byte order.
  */
 
 #include <stdio.h>