(ITS#4764) ditStructureRules/dITStructureRules typo error?

Full_Name: Gang Wang Version: 2.3.20 OS: URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (202.108.130.138)

openldap-2.3.20/servers/slapd/schema_prep.c Line 370

"MAY ( dITStructureRules $ nameForms $ ditContentRules $ " { "ditStructureRules", "( 2.5.21.1 NAME 'dITStructureRules' " { "ditContentRules", "( 2.5.21.2 NAME 'dITContentRules' "

there are some "dIT" in the strings instead of "dit". is it some kind of typo error? I'm porting this version to some operating system. the compiler complains ...