diff --git a/10-50-reverse.sh b/10-50-reverse.sh
index e442781..d5122c3 100755
--- a/10-50-reverse.sh
+++ b/10-50-reverse.sh
@@ -16,12 +16,12 @@ ReverseServerName=aquarius.gw.fff.community.
 #################################################################
 
 function GetZoneFileSerial() {
-	local FirstSOALineAndFollowing="/\S\+\s\+IN\s\+SOA\s/,\$!d;"
+	local FirstSOALineAndFollowing="^/\S\+\s\+IN\s\+SOA\s/,\$!d;"
 	local RemoveComments=":a;s/;.*$//g;"
-	local EleminateLineBreaks=":a;N;\$!ba;s/\n//g;"
-	local SearchPrintSerial="s/\S\+\s\+IN\s\+SOA\s\+\S\+\s\+\S\+\s\+(\?\s\+\([0-9]*\).*/\1/"
+	local RemoveLineBreaks=":a;N;\$!ba;s/\n//g;"
+	local SearchPrintSerial="s/^\S\+\s\+IN\s\+SOA\s\+\S\+\s\+\S\+\s\+(\?\s\+\([0-9]*\).*/\1/"
 
-	local Serial=$(sed -e "$FirstSOALineAndFollowing""$RemoveComments""$EleminateLineBreaks""$SearchPrintSerial" "$1")
+	local Serial=$(sed -e "$FirstSOALineAndFollowing""$RemoveComments""$RemoveLineBreaks""$SearchPrintSerial" "$1")
 	echo "$Serial"
 }