diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index 80e4e20..7ff0c88 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -45,7 +45,7 @@
       ## Discard any known bad backup scripts
       cd /$1/addon.d/
       for f in *sh; do
-          s=$(md5sum $f | awk {'print $1'})
+          s=$(md5sum $f | cut -c-32)
           grep -q $s /system/addon.d/blacklist && rm -f $f
       done
   fi
@@ -57,7 +57,7 @@
       ## forcefully keep any version-independent stuff
       cd /$1/addon.d/
       for f in *sh; do
-          s=$(md5sum $f | awk {'print $1'})
+          s=$(md5sum $f | cut -c-32)
           grep -q $s /system/addon.d/whitelist
           if [ $? -eq 0 ]; then
               found=1