diff --git a/configure/os/CONFIG_SITE.Common.solaris-sparc b/configure/os/CONFIG_SITE.Common.solaris-sparc
index 38ce08e64..9ed59063b 100644
--- a/configure/os/CONFIG_SITE.Common.solaris-sparc
+++ b/configure/os/CONFIG_SITE.Common.solaris-sparc
@@ -9,6 +9,7 @@
 # to include command-line editing and history support
 #
 
+# Readline library provides command-line editing and history in IOC shell
 #COMMANDLINE_LIBRARY = READLINE
 
 # Use stLport library instead of default Cstd library