diff --git a/release/amd64/mkisoimages-uefi.sh b/release/amd64/mkisoimages-uefi.sh
index 9526ad7..0441dac 100644
--- a/release/amd64/mkisoimages-uefi.sh
+++ b/release/amd64/mkisoimages-uefi.sh
@@ -50,7 +50,7 @@ if [ $# -lt 3 ]; then
        exit 1
 fi
 
-LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
+LABEL=`echo $1 | tr '[:lower:]' '[:upper:]' | cut -c 1-32`; shift
 NAME=$1; shift
 
 publisher="The FreeBSD Project.  http://www.FreeBSD.org/"