diff --git a/deployment.sh b/deployment.sh
index 28fdd3e..1315fb5 100755
--- a/deployment.sh
+++ b/deployment.sh
@@ -1216,7 +1216,7 @@ EOT
       echo "ngcp-mediaproxy-ng. kernel package already installed, skipping" | tee -a /tmp/dkms.log
     else
       # brrrr, don't tell this anyone or i'll commit with http://whatthecommit.com/ as commit msg!
-      KERNELHEADERS=$(basename $(ls -d ${TARGET}/usr/src/linux-headers*amd64 | grep -v -- -rt-amd64 | sort -u | head -1))
+      KERNELHEADERS=$(basename $(ls -d ${TARGET}/usr/src/linux-headers*amd64 | grep -v -- -rt-amd64 | sort -u -r | head -1))
       if [ -z "$KERNELHEADERS" ] ; then
         die "Error: no kernel headers found for building the ngcp-mediaproxy-ng kernel module."
       fi
@@ -1788,7 +1788,7 @@ vagrant_configuration() {
   grml-chroot $TARGET apt-get -y install libc6-dev gcc
   fake_uname
 
-  KERNELHEADERS=$(basename $(ls -d ${TARGET}/usr/src/linux-headers*amd64 | grep -v -- -rt-amd64 | sort -u | head -1))
+  KERNELHEADERS=$(basename $(ls -d ${TARGET}/usr/src/linux-headers*amd64 | grep -v -- -rt-amd64 | sort -u -r | head -1))
   if [ -z "$KERNELHEADERS" ] ; then
     die "Error: no kernel headers found for building the VirtualBox Guest Additions kernel module."
   fi