diff --git a/lib/awful/prompt.lua.in b/lib/awful/prompt.lua.in
index 18b1fd674..b0d54e78f 100644
--- a/lib/awful/prompt.lua.in
+++ b/lib/awful/prompt.lua.in
@@ -46,6 +46,7 @@ local function history_check_load(id, max)
                    break
 		end
             end
+            f:close()
 	end
     end
 end