diff --git a/install.sh b/install.sh
index 90d3780..ae4aaa4 100755
--- a/install.sh
+++ b/install.sh
@@ -1,29 +1,29 @@
 #! /bin/sh
 
-if [ ! -d $1 ]; then
-	mkdir $1
+if [ ! -d "$1" ]; then
+	mkdir "$1"
 fi
 
-if [ ! -d $2 ]; then
-	mkdir $2
+if [ ! -d "$2" ]; then
+	mkdir "$2"
 fi
 
-if [ ! -d $3 ]; then
-	mkdir $3
+if [ ! -d "$3" ]; then
+	mkdir "$3"
 fi
 
-if [ ! -d $4 ]; then
-	mkdir $4
+if [ ! -d "$4" ]; then
+	mkdir "$4"
 fi
 
-if [ ! -d $5 ]; then
-	mkdir $5
+if [ ! -d "$5" ]; then
+	mkdir "$5"
 fi
 
-if [ ! -d $6 ]; then
-	mkdir $6
+if [ ! -d "$6" ]; then
+	mkdir "$6"
 fi
 
 if [ ! -e /usr/bin/cut ]; then
-	cp cut $7/usr/bin
+	cp cut "$7/usr/bin"
 fi