diff -Naur gentoo-bashcomp-20140911.orig/completions/emerge gentoo-bashcomp-20140911/completions/emerge
--- gentoo-bashcomp-20140911.orig/completions/emerge	2017-07-31 12:08:49.600078267 +0200
+++ gentoo-bashcomp-20140911/completions/emerge	2017-07-31 12:09:22.110078420 +0200
@@ -26,6 +26,12 @@
         return 0
     fi
 
+    if [[ ${cur} =~ ^@ ]] ; then
+        local SET_LIST=($(emerge --list-sets | xargs))
+        COMPREPLY=( $( compgen -W '${SET_LIST[@]/#/@}' $cur ) )
+        return 0
+    fi
+
     # find action
     for x in ${COMP_LINE} ; do
         if [[ ${x} =~ ^(system|world)$ ]] || [[ ${x} =~ -[CPcs] ]] || \