--- trunk/include/cpan.sminc	2012/03/12 21:18:55	11553
+++ trunk/include/cpan.sminc	2013/03/15 10:20:44	16912
@@ -8,8 +8,8 @@
 #   ${CPAN_AUTHOR}:   needed, author of the CPAN-module
 [[ -z ${CPAN_AUTHOR} ]] && die "cpan.sminc: \$CPAN_AUTHOR not given!"
 
-CPAN_AUTHOR_UPPER=$(echo ${CPAN_AUTHOR} | tr [a-z] [A-Z])
-CPAN_AUTHOR_LOWER=$(echo ${CPAN_AUTHOR} | tr [A-Z] [a-z])
+CPAN_AUTHOR_UPPER=$(echo ${CPAN_AUTHOR} | tr '[a-z]' '[A-Z]')
+CPAN_AUTHOR_LOWER=$(echo ${CPAN_AUTHOR} | tr '[A-Z]' '[a-z]')
 
 : ${CPAN_MODULE="${PNAME}"}