diff --git a/atom b/atom
index 5f78de1..fe164f2 100755
--- a/atom
+++ b/atom
@@ -28,10 +28,13 @@ declare -A			\
 	exit $EBASHVERS
 }
 
-DOCDIR=./doc
-SHAREDIR=./share
-exampleconf=$DOCDIR/example.cfg
-schema=$SHAREDIR/schema.sql
+declare -r				\
+	DOCDIR=./doc			\
+	SHAREDIR=./share		\
+	exampleconf=$DOCDIR/example.cfg	\
+	schema=$SHAREDIR/schema.sql	\
+					\
+	oldIFS="$IFS"
 
 #parse arguments
 #parse config