diff --git a/centos/install.sh b/centos/install.sh
index 909583b..48ade8c 100644
--- a/centos/install.sh
+++ b/centos/install.sh
@@ -7,23 +7,23 @@ cd "$(dirname "$0")"
 . ./resources/colors.sh
 . ./resources/arguments.sh
 
-if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
+if [ .$CPU_CHECK = .true ] && [ .$USE_SWITCH_SOURCE = .false ]; then
 	#check what the CPU and OS are
 	OS_test=$(uname -m)
 	CPU_arch='unknown'
 	OS_bits='unknown'
 	CPU_bits='unknown'
-	if [ $OS_test = 'armv7l' ]; then
+	if [ .$OS_test = .'armv7l' ]; then
 		OS_bits='32'
 		CPU_bits='32'
 		# RaspberryPi 3 is actually armv8l but current Raspbian reports the cpu as armv7l and no Raspbian 64Bit has been released at this time
 		CPU_arch='arm'
-	elif [ $OS_test = 'armv8l' ]; then
+	elif [ .$OS_test = .'armv8l' ]; then
 		# We currently have no test case for armv8l
 		OS_bits='unknown'
 		CPU_bits='64'
 		CPU_arch='arm'
-	elif [ $OS_test = 'i386' ]; then
+	elif [ .$OS_test = .'i386' ]; then
 		OS_bits='32'
 	if [ "$(grep -o -w 'lm' /proc/cpuinfo)" = 'lm' ]; then
 			CPU_bits='64'
@@ -31,7 +31,7 @@ if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
 			CPU_bits='32'
 		fi
 		CPU_arch='x86'
-	elif [ $OS_test = 'i686' ]; then
+	elif [ .$OS_test = .'i686' ]; then
 		OS_bits='32'
 		if [ "$(grep -o -w 'lm' /proc/cpuinfo)" = 'lm' ]; then
 			CPU_bits='64'
@@ -39,7 +39,7 @@ if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
 			CPU_bits='32'
 		fi
 		CPU_arch='x86'
-	elif [ $OS_test = 'x86_64' ]; then
+	elif [ .$OS_test = .'x86_64' ]; then
 		OS_bits='64'
 		if [ "$(grep -o -w 'lm' /proc/cpuinfo)" = 'lm' ]; then
 			CPU_bits='64'
@@ -49,17 +49,17 @@ if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
 		CPU_arch='x86'
 	fi
 	
-	if [ $CPU_arch = 'arm' ]; then
+	if [ .$CPU_arch = .'arm' ]; then
 			error "CentOS on arm is not supported at this time"
 			exit 3
-	elif [ $CPU_arch = 'x86' ]; then
-		if [ $OS_bits = '32' ]; then
+	elif [ .$CPU_arch = .'x86' ]; then
+		if [ .$OS_bits = .'32' ]; then
 			error "You are using a 32bit OS this is unsupported"
-			if [ $CPU_bits = '64' ]; then
+			if [ .$CPU_bits = .'64' ]; then
 				warning " Your CPU is 64bit you should consider reinstalling with a 64bit OS"
 			fi
 			exit 3
-		elif [ $OS_bits = '64' ]; then
+		elif [ .$OS_bits = .'64' ]; then
 			verbose "Correct CPU/OS detected"
 		else
 			error "Unknown OS_bits $OS_bits this is unsupported"
diff --git a/centos/resources/arguments.sh b/centos/resources/arguments.sh
index ac8333e..fbcac06 100644
--- a/centos/resources/arguments.sh
+++ b/centos/resources/arguments.sh
@@ -31,7 +31,7 @@ if [ -z "$CPU_CHECK" ]; then
 	  esac
 	done
 	
-	if [ $HELP = true ]; then
+	if [ .$HELP = .true ]; then
 		warning "Debian installer script"
 		warning "	--use-switch-source will use freeswitch from source rather than ${green}(default:packages)"
 		warning "	--use-switch-package-all if using packages use the meta-all package"
diff --git a/centos/resources/fail2ban.sh b/centos/resources/fail2ban.sh
index b6ac77c..1e555a5 100644
--- a/centos/resources/fail2ban.sh
+++ b/centos/resources/fail2ban.sh
@@ -24,7 +24,7 @@ cp ./fail2ban/nginx-dos.conf /etc/fail2ban/filter.d/nginx-dos.conf
 cp ./fail2ban/jail.local /etc/fail2ban/jail.local
 
 #update config if source is being used
-#if [ $USE_FREESWITCH_SOURCE = true ]; then
+#if [ .$USE_FREESWITCH_SOURCE = .true ]; then
 #       sed 's#var/log/freeswitch#usr/local/freeswitch/log#g' -i /etc/fail2ban/jail.local
 #fi
 
diff --git a/centos/resources/fusionpbx.sh b/centos/resources/fusionpbx.sh
index 5add3b0..8f8affd 100644
--- a/centos/resources/fusionpbx.sh
+++ b/centos/resources/fusionpbx.sh
@@ -22,7 +22,7 @@ wget https://forensics.cert.org/cert-forensics-tools-release-el7.rpm
 rpm -Uvh cert-forensics-tools-release*rpm
 yum -y --enablerepo=forensics install lame
 
-if [ $USE_SYSTEM_MASTER = true ]; then
+if [ .$USE_SYSTEM_MASTER = .true ]; then
 	verbose "Using master"
 	BRANCH=""
 else