diff --git a/README.md b/README.md
index edd47bb5..933bbdf3 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@
 If upgrading from Grouper version 2.3 to 2.4 and using LDAP, modifications will be needed in subject.properties and grouper-loaders.proprties. Further details about this can be found at the following URL:
 https://spaces.at.internet2.edu/display/Grouper/vt-ldap+to+ldaptive+migration+for+LDAP+access
 
+In particular, in subject.properties, *.param.base.value should be adjusted to only contain the RDN (Relative Distinguished Name), not the full DN.  For example, "OU=People", not "OU=People,DC=domain,DC=edu"
+
 Additional upgrade information can be found at the following URL: https://spaces.at.internet2.edu/display/Grouper/v2.4+Upgrade+Instructions+from+v2.3
 
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