diff --git a/scripts/debian/postinst.in b/scripts/debian/postinst.in
index 36340cbc..3217dbc5 100755
--- a/scripts/debian/postinst.in
+++ b/scripts/debian/postinst.in
@@ -19,8 +19,7 @@ set -e
 
 chosen_driver=
 
-case "$1" in
-    configure)
+if [ "$1" = "configure" ]; then
         if [ -x /usr/bin/dialog ]; then
           # If dialog is installed, create a dialog to let users choose the correct driver for them
           CHOICE=$(dialog --clear --backtitle "Choose your preferred driver" --title "Falco driver" --menu "Choose one of the following options:" 15 40 4 \
@@ -46,8 +45,7 @@ case "$1" in
                     ;;
             esac
         fi
-    ;;
-esac
+fi
 
 # If needed, try to load/compile the driver through falco-driver-loader
 case "$chosen_driver" in
diff --git a/scripts/rpm/postinstall.in b/scripts/rpm/postinstall.in
index 2b3d1c93..4677deed 100755
--- a/scripts/rpm/postinstall.in
+++ b/scripts/rpm/postinstall.in
@@ -18,8 +18,7 @@ set -e
 
 chosen_driver=
 
-case "$1" in
-    configure)
+if [ $1 -eq 1 ]; then
         if [ -x /usr/bin/dialog ]; then
             # If dialog is installed, create a dialog to let users choose the correct driver for them
             CHOICE=$(dialog --clear --backtitle "Choose your preferred driver" --title "Falco driver" --menu "Choose one of the following options:" 15 40 4 \
@@ -45,8 +44,7 @@ case "$1" in
                         ;;
                 esac
         fi
-    ;;
-esac
+fi
 
 # If needed, try to load/compile the driver through falco-driver-loader
 case "$chosen_driver" in