diff --git a/default.inc b/default.inc
index b9516e6..857bcc5 100755
--- a/default.inc
+++ b/default.inc
@@ -239,7 +239,7 @@ service_exists() {
 CHECK_HOST(){
 	if [ ! -z ${1+x} ]; then
 		if [ "$(dpkg-query -W --showformat='${Status}\n' nmap 2>/dev/null | grep "install ok installed")" != "" ]; then
-			[ "$(nmap ${1} -p 22,80,443 -n | grep open)" != "" ] || [ "$(nmap -sU ${1} -p 161 -n | grep open)" != "" ] && echo true || echo false
+			[ "$(nmap ${1} -p 22,80,443 -n | grep 'open ')" != "" ] || [ "$(nmap -sU ${1} -p 161 -n | grep 'open ')" != "" ] && echo true || echo false
 		else
 			ping -c 3 ${1} > /dev/null 2>&1
 			[ $? -ne 0 ] && echo false || echo true