diff --git a/etc/completion/bash/guix b/etc/completion/bash/guix
index c92f8915c9..01b0e20394 100644
--- a/etc/completion/bash/guix
+++ b/etc/completion/bash/guix
@@ -1,5 +1,5 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
 #
 # This file is part of GNU Guix.
 #
@@ -158,7 +158,7 @@ _guix_complete ()
 	    elif _guix_is_command "import"
 	    then
 		_guix_complete_subcommand
-	    elif _guix_is_command "hash"
+	    elif _guix_is_command "hash" || _guix_is_command "gc"
 	    then
 		_guix_complete_file
 	    else