diff --git a/scripts/ffmprovisr b/scripts/ffmprovisr
index 17c3976..52b6d7c 100755
--- a/scripts/ffmprovisr
+++ b/scripts/ffmprovisr
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 
-if [[ $OSTYPE = darwin* ]] ; then
+# This allows to open ffmprovisr locally from the terminal.
+
+if [[ ${OSTYPE} = "darwin"* ]] ; then
     default_browser=$(plutil -convert json ~/Library/Preferences/com.apple.LaunchServices/com.apple.launchservices.secure.plist -r -o - | grep https -b1 | tail -n1 | cut -d'"' -f4)
     if [ -d /usr/local/Cellar/ffmprovisr ] ; then
         ffmprovisr_path=$(find /usr/local/Cellar/ffmprovisr -iname 'index.html' | sort -M | tail -n1)
@@ -13,7 +15,7 @@ if [[ $OSTYPE = darwin* ]] ; then
     else
         open "${ffmprovisr_path}"
     fi
-elif [[ $OSTYPE = linux-gnu ]] ; then
+elif [[ ${OSTYPE} = "linux-gnu" ]] ; then
     if [ -d ~/.linuxbrew/Cellar/ffmprovisr ] ; then
         ffmprovisr_path=$(find ~/.linuxbrew/Cellar/ffmprovisr -iname 'index.html' | sort -M | tail -n1)
     fi