diff --git a/91_install_cli.sh b/91_install_cli.sh
index 7f1ad20..3aac57d 100755
--- a/91_install_cli.sh
+++ b/91_install_cli.sh
@@ -12,6 +12,14 @@
   curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
 fi
 
+if type -p arduino-cli >/dev/null; then
+  echo "arduino-cli is installed."
+  sleep 1
+else 
+  # add $HOME/bin to PATH
+  export PATH="$HOME/bin:$PATH"
+fi
+
 arduino-cli update
 arduino-cli upgrade
 arduino-cli version