diff --git a/release/amd64/mkisoimages.sh b/release/amd64/mkisoimages.sh
index 74a34a93221e..105a07395fc2 100644
--- a/release/amd64/mkisoimages.sh
+++ b/release/amd64/mkisoimages.sh
@@ -36,9 +36,9 @@ if [ $# -lt 3 ]; then
 	exit 1
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 
-echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $1/etc/fstab
+echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > $1/etc/fstab
 makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $*
 rm $1/etc/fstab
diff --git a/release/i386/mkisoimages.sh b/release/i386/mkisoimages.sh
index 74a34a93221e..105a07395fc2 100644
--- a/release/i386/mkisoimages.sh
+++ b/release/i386/mkisoimages.sh
@@ -36,9 +36,9 @@ if [ $# -lt 3 ]; then
 	exit 1
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 
-echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $1/etc/fstab
+echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > $1/etc/fstab
 makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $*
 rm $1/etc/fstab
diff --git a/release/ia64/mkisoimages.sh b/release/ia64/mkisoimages.sh
index 59fe025d95dd..d4a08024341b 100644
--- a/release/ia64/mkisoimages.sh
+++ b/release/ia64/mkisoimages.sh
@@ -37,7 +37,7 @@ if [ $# -lt 3 ]; then
     exit 1
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 BASE=$1; shift
 
diff --git a/release/pc98/mkisoimages.sh b/release/pc98/mkisoimages.sh
index 313641be4f89..68f219638d1c 100644
--- a/release/pc98/mkisoimages.sh
+++ b/release/pc98/mkisoimages.sh
@@ -36,9 +36,9 @@ if [ $# -lt 3 ]; then
 	exit 1
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 
-echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $1/etc/fstab
+echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > $1/etc/fstab
 makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $*
 rm $1/etc/fstab
diff --git a/release/powerpc/mkisoimages.sh b/release/powerpc/mkisoimages.sh
index 9542d2f369a6..6bd29a73eee3 100644
--- a/release/powerpc/mkisoimages.sh
+++ b/release/powerpc/mkisoimages.sh
@@ -58,10 +58,10 @@ if [ $# -lt 3 ]; then
 	exit 1
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 
-echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $1/etc/fstab
+echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > $1/etc/fstab
 makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $*
 rm $1/etc/fstab
 rm /tmp/hfs-boot-block
diff --git a/release/sparc64/mkisoimages.sh b/release/sparc64/mkisoimages.sh
index c2937cbf6ee6..9ae6dcfd71ca 100644
--- a/release/sparc64/mkisoimages.sh
+++ b/release/sparc64/mkisoimages.sh
@@ -63,7 +63,7 @@ if [ $? -ne 0 ]; then
 	fi
 fi
 
-LABEL=$1; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
 NAME=$1; shift
 
 echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > $1/etc/fstab