diff --git a/src/command.cpp b/src/command.cpp
index 5bdc80f22..e713efbed 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -906,8 +906,8 @@ int handleShow (std::string& outs)
       "dateformat.holiday dateformat.report dateformat.annotation debug "
       "default.command default.priority default.project defaultwidth due "
       "dependency.confirmation dependency.reminder locale displayweeknumber "
-      "export.ical.class echo.command fontunderline locking monthsperline nag "
-      "next journal.time journal.time.start.annotation journal.info "
+      "export.ical.class echo.command fontunderline gc locking monthsperline "
+      "nag next journal.time journal.time.start.annotation journal.info "
       "journal.time.stop.annotation project shadow.command shadow.file "
       "shadow.notify weekstart editor import.synonym.id import.synonym.uuid "
       "complete.all.projects complete.all.tags search.case.sensitive hooks "