Update README.md

README.md

@@ -135,7 +135,7 @@ All job is done by `jsmn_parser` object. You can initialize a new parser using:
 	// js - pointer to JSON string
 	// tokens - an array of tokens available
 	// 10 - number of tokens available
-	jsmn_parse(&parser, js, tokens, 10);
+	jsmn_parse(&parser, js, strlen(js), tokens, 10);
 
 This will create a parser, and then it tries to parse up to 10 JSON tokens from
 the `js` string.