diff --git a/scstadmin/init.d/scst b/scstadmin/init.d/scst
index 6541905bb..580dd06dc 100755
--- a/scstadmin/init.d/scst
+++ b/scstadmin/init.d/scst
@@ -126,9 +126,9 @@ parse_scst_conf() {
     if [ ! -e $SCST_CFG ]; then
         return 0
     fi
-    local nonblanks="[^ 	]\{1,\}"
-    local blanks="[ 	]\{1,\}"
-    local optblanks="[ 	]*"
+    local nonblanks="[^[:blank:]]\{1,\}"
+    local blanks="[[:blank:]]\{1,\}"
+    local optblanks="[[:blank:]]*"
     SCST_MODULES="$SCST_MODULES `sed -n -e 's/^HANDLER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{'"$optblanks"'$/\1/p' \
                          -e 's/^\[HANDLER'"$blanks"'\('"$nonblanks"'\)\]$/\1/p' $SCST_CFG \
         | while read h; do