diff --git a/doc/man/man5/slurm.conf.5 b/doc/man/man5/slurm.conf.5
index 420d8093b01e050daf030f22f1c9ade8aeb950c3..51806aa46419be48735c3549168d7623dc79f9a1 100644
--- a/doc/man/man5/slurm.conf.5
+++ b/doc/man/man5/slurm.conf.5
@@ -226,7 +226,11 @@ OpenMPI (version 1.3 or higher)
 \fBClusterName\fR
 The name by which this SLURM managed cluster is known in the
 accounting database.  This is needed distinguish accounting records
-when multiple clusters report to the same database.
+when multiple clusters report to the same database. Because of limitations
+in some databases, any upper case letters in the name will be silently mapped
+to lower case. In order to avoid confusion, it is recommended that the name
+be lower case.
+
 
 .TP
 \fBCompleteWait\fR