diff --git a/nagios/check_whois b/nagios/check_whois
index dc6ef2e..b0accd4 100755
--- a/nagios/check_whois
+++ b/nagios/check_whois
@@ -105,7 +105,7 @@ extract_date_from_whois() {
 	# 7 - .jp
 	# Add your own filter here :)
 	EXPIRATION_DATE="$( sed -n \
-		-e 's/^Registry Expiry Date: //p' \
+		-e 's/^Registry Expiry Date:[[:space:]]\+//p' \
 		-e '/^[^[:space:]]/s/.*\(xpiry\|xpiration\) Date:[[:space:]]\+//p' \
 		-e 's/.*\(xpiry\|xpiration\) Date:[[:space:]]\+//p' \
 		-e 's/^expires\?:[[:space:]]*//p' \