diff --git a/Joplin_install_and_update.sh b/Joplin_install_and_update.sh
index bdea8ee21..ce7cbe299 100755
--- a/Joplin_install_and_update.sh
+++ b/Joplin_install_and_update.sh
@@ -184,7 +184,7 @@ if command -v lsb_release &> /dev/null; then
   # Check for "The SUID sandbox helper binary was found, but is not configured correctly" problem.
   # It is present in Debian 1X. A (temporary) patch will be applied at .desktop file
   # Linux Mint 4 Debbie is based on Debian 10 and requires the same param handling.
-  if [ $DISTVER =~ Debian1. ] || [ "$DISTVER" = "Linuxmint4" ] && [ "$DISTCODENAME" = "debbie" ]
+  if [[ $DISTVER =~ Debian1. ]] || [ "$DISTVER" = "Linuxmint4" ] && [ "$DISTCODENAME" = "debbie" ]
   then
     SANDBOXPARAM=" --no-sandbox"
   fi