diff --git a/completions/bzip2 b/completions/bzip2
index 6e6c68bb..1bc98288 100644
--- a/completions/bzip2
+++ b/completions/bzip2
@@ -9,6 +9,10 @@ _bzip2()
         -b|-h|--help|-p)
             return 0
             ;;
+        -n)
+            COMPREPLY=( $( compgen -W "{1..$(_ncpus)}" -- "$cur" ) )
+            return 0
+            ;;
     esac
 
     if [[ "$cur" == -* ]]; then