diff --git a/script/lib/confirmation.sh b/script/lib/confirmation.sh
index e04569c..52e332b 100644
--- a/script/lib/confirmation.sh
+++ b/script/lib/confirmation.sh
@@ -8,7 +8,7 @@ function confirmation(){
 	# Consistency check for the OVERWRITEINSTALL and ERASEALL
 	if [ ${ERASEALL} -eq 1 -a ${OVERWRITEINSTALL} -eq 1 ] ; then 
 		cat <<- HEREDOC 1>&2
-		***** ERROR : Confliction between ERASEALL and OVERWRITEINATALL *****
+		***** ERROR : Confliction between ERASEALL and OVERWRITEINSTALL *****
 		...ERASEALL = ${ERASEALL}
 		...OVERWRITEINSTALL = ${OVERWRITEINSTALL}
 		...Check configuration in config.txt
diff --git a/script/lib/preinstall.sh b/script/lib/preinstall.sh
index 6f9a987..138cf3c 100644
--- a/script/lib/preinstall.sh
+++ b/script/lib/preinstall.sh
@@ -80,7 +80,7 @@ function pre_install() {
 
 	# Create a ROOT Logical Volume on VG. 
 	if [ -e /dev/mapper/${VGNAME}-${LVROOTNAME} ] ; then # exist
-		if [ ${OVERWRITEINATALL} -eq 1 ] ; then # exist and overwrite install
+		if [ ${OVERWRITEINSTALL} -eq 1 ] ; then # exist and overwrite install
 			echo "...Logical volume "${VGNAME}-${LVROOTNAME}" already exists. OK."
 		else	# exist and not overwriteinstall
 			cat <<- HEREDOC 1>&2
@@ -98,7 +98,7 @@ function pre_install() {
 			return 1 # with error status
 		fi
 	else	# not exsit
-		if [ ${OVERWRITEINATALL} -eq 1 ] ; then
+		if [ ${OVERWRITEINSTALL} -eq 1 ] ; then
 			cat <<- HEREDOC 1>&2
 			***** ERROR : Logical volume "${VGNAME}-${LVROOTNAME}" doesn't exist while overwrite install. *****
 			...Check consistency of config.txt.