diff --git a/dosemu2/info-v6.sh b/dosemu2/info-v6.sh
index 19d5a9e..e8a0f47 100644
--- a/dosemu2/info-v6.sh
+++ b/dosemu2/info-v6.sh
@@ -1,4 +1,4 @@
-if [ $DOSEMU = "dosemu2" ]; then
+if [ "$DOSEMU" = "dosemu2" ]; then
 echo "" >> ${DBP_INFO}
 echo "DosEmu2 Integration with Mystic" >> ${DBP_INFO}
 echo "" >> ${DBP_INFO}
@@ -7,7 +7,7 @@ echo "" >> ${DBP_INFO}
 echo "==============================================================================================================" >> ${DBP_INFO}
 fi
 
-if [ $DOSEMU = "dosemu" ]; then
+if [ "$DOSEMU" = "dosemu" ]; then
 echo "" >> ${DBP_INFO}
 echo "DosEmu Integration with Mystic" >> ${DBP_INFO}
 echo "" >> ${DBP_INFO}
diff --git a/dosemu2/install-v6.sh b/dosemu2/install-v6.sh
index ad08a0c..f02c4cf 100644
--- a/dosemu2/install-v6.sh
+++ b/dosemu2/install-v6.sh
@@ -1,4 +1,4 @@
-if [ $DOSEMU = "dosemu2" ]; then
+if [ "$DOSEMU" = "dosemu2" ]; then
 msg_info "Installing DosEmu2 Dependencies for ${APP}"
 pushd $MSTEMPDIR &>/dev/null
 curl 'https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x6d9cd73b401a130336ed0a56ebe1b5ded2ad45d6' | tee /etc/apt/trusted.gpg.d/code.launchpad.net-dosemu2.asc &>/dev/null
@@ -11,7 +11,7 @@ msg_ok "Installing DosEmu2 Dependencies for ${APP}"
 
 fi
 
-if [ $DOSEMU = "dosemu" ]; then
+if [ "$DOSEMU" = "dosemu" ]; then
 msg_info "Installing DosEmu Dependencies for ${APP}"
 pushd $MSTEMPDIR &>/dev/null
 curl 'https://deb.freexian.com/extended-lts/archive-key.gpg' | tee /etc/apt/trusted.gpg.d/freexian-archive-extended-lts.gpg &>/dev/null
diff --git a/install-next.sh b/install-next.sh
index 144be77..d8aa1b4 100644
--- a/install-next.sh
+++ b/install-next.sh
@@ -172,7 +172,7 @@ source $MSTEMPDIR/mystic/dbp/prompt-${SCRIPT_VER}.sh
 # Add Fail2ban | banip
 source $MSTEMPDIR/mystic/fail2ban/prompt-${SCRIPT_VER}.sh
 # Add Dosemu2
-if [ ! -z "$DOSEMU" ]; then
+if [ -n "$DOSEMU" ]; then
 source $MSTEMPDIR/mystic/dosemu2/prompt-${SCRIPT_VER}.sh
 fi
 
@@ -195,7 +195,7 @@ source $MSTEMPDIR/mystic/dbp/install-${SCRIPT_VER}.sh
 # Add Fail2ban | banip
 source $MSTEMPDIR/mystic/fail2ban/install-${SCRIPT_VER}.sh
 # Add Dosemu2
-if [ ! -z "$DOSEMU" ]; then
+if [ -n "$DOSEMU" ]; then
 source $MSTEMPDIR/mystic/dosemu2/install-${SCRIPT_VER}.sh
 fi
 
@@ -218,7 +218,7 @@ source $MSTEMPDIR/mystic/dbp/config-${SCRIPT_VER}.sh
 # Add Fail2ban | banip
 source $MSTEMPDIR/mystic/fail2ban/config-${SCRIPT_VER}.sh
 # Add Dosemu2
-if [ ! -z "$DOSEMU" ]; then
+if [ -n "$DOSEMU" ]; then
 source $MSTEMPDIR/mystic/dosemu2/config-${SCRIPT_VER}.sh
 fi
 
@@ -250,7 +250,7 @@ source $MSTEMPDIR/mystic/dbp/info-${SCRIPT_VER}.sh
 # Add Fail2ban | banip
 source $MSTEMPDIR/mystic/fail2ban/info-${SCRIPT_VER}.sh
 # Add Dosemu2
-if [ ! -z "$DOSEMU" ]; then
+if [ -n "$DOSEMU" ]; then
 source $MSTEMPDIR/mystic/dosemu2/info-${SCRIPT_VER}.sh
 fi