diff --git a/init_env b/init_env
index d5119ab97720ae964cd55ec2d58abbb12e61119a..e2971b7b16ebdf79146b3c8b8ce294abce145235 100644
--- a/init_env
+++ b/init_env
@@ -20,6 +20,9 @@
 grep "bash" /proc/$$/cmdline &>/dev/null
 if [ $? -eq 0 ]; then
 	source ./src/shell/lisa_shell
+	if [ ! $? -eq 0 ]; then
+	echo "ERROR: LISA must be initialized from the LISA home folder."
+	fi
 else
 	echo "WARNING: Current shell is not a BASH"
 	# Check if a bash shell is available
diff --git a/src/shell/lisa_shell b/src/shell/lisa_shell
index 3b8098d54470bb23f48cd81e1855d5631ca44761..bb708e3c396bd062102226f4be0846f0547bd508 100644
--- a/src/shell/lisa_shell
+++ b/src/shell/lisa_shell
@@ -25,7 +25,7 @@ source src/shell/lisa_colors
 DEVMODE=${DEVMODE:-1}
 
 # Get base installation path of LISA
-LISA_HOME="$(pwd)"
+LISA_HOME=$(pwd)
 
 export PYTHONPATH=''
 export PYTHONPATH=$LISA_HOME/libs/utils:$PYTHONPATH