diff --git a/tools/sample-wrapper b/tools/sample-wrapper
index 224269cf1fd8d833da9e4f4a2aef1a483b004e67..702e36e173110230bd71cc9ed2eda4d21119114b 100755
--- a/tools/sample-wrapper
+++ b/tools/sample-wrapper
@@ -5,6 +5,7 @@ CMUCLLIB=/<<your-cmucl-path>>/lib
 export CMUCLLIB
 
 #
+# This might be necessary for SunOS.  Not needed for Solaris.
 # If /tmp is a "tmpfs" filesystem (mounted on "swap") then uncomment the
 # following two lines, and fill in an alternate path:
 #CMUCL_EMPTYFILE=/<<your-temp-path>>/empty