diff --git a/README.md b/README.md
index 5c3507b..20c2503 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,9 @@ static const Block blocks[] = {
 
 Apart from that you can also modify the block delimiters and width of each block as shown.
 ```c
+// Maximum length of each block, expressed in number of characters.
 #define CMDLENGTH 50
+
 #define delimiter " "
 ```