diff --git a/contrib/btc_all.lua b/contrib/btc_all.lua
index b107a47..e28cada 100644
--- a/contrib/btc_all.lua
+++ b/contrib/btc_all.lua
@@ -4,7 +4,6 @@
 ---------------------------------------------------
 
 -- {{{ Grab environment
-local setmetatable = setmetatable
 local pcall = pcall
 local helpers = require("vicious.helpers")
 local spawn = require("vicious.spawn")
@@ -51,13 +50,6 @@ function btc_all.async(format, warg, callback)
 
     spawn.easy_async(cmd, function(stdout) callback(parse(stdout)) end)
 end
-
-local function worker(format, warg)
-    local ret
-    btc_all.async(format, warg, function (price) ret = price end)
-    while ret == nil do end
-    return ret
-end
 -- }}}
 
-return setmetatable(btc_all, { __call = function(_, ...) return worker(...) end })
+return helpers.setasyncall(btc_all)
diff --git a/widgets/pkg_all.lua b/widgets/pkg_all.lua
index bbefc63..639ba4e 100644
--- a/widgets/pkg_all.lua
+++ b/widgets/pkg_all.lua
@@ -4,8 +4,8 @@
 ---------------------------------------------------
 
 -- {{{ Grab environment
-local setmetatable = setmetatable
 local spawn = require("vicious.spawn")
+local helpers = require("vicious.helpers")
 -- }}}
 
 
@@ -42,16 +42,4 @@ function pkg_all.async(format, warg, callback)
 end
 -- }}}
 
--- {{{ Packages widget type
-local function worker(format, warg)
-    local ret = nil
-
-    pkg_all.async(format, warg, function(data) ret = data end)
-
-    while ret==nil do end
-    return ret
-end
--- }}}
-
-
-return setmetatable(pkg_all, { __call = function(_, ...) return worker(...) end })
+return helpers.setasyncall(pkg_all)
diff --git a/widgets/weather_all.lua b/widgets/weather_all.lua
index f38ec8b..6bd4cfc 100644
--- a/widgets/weather_all.lua
+++ b/widgets/weather_all.lua
@@ -5,7 +5,6 @@
 
 -- {{{ Grab environment
 local tonumber = tonumber
-local setmetatable = setmetatable
 local math = { ceil = math.ceil }
 local string = { match = string.match }
 
@@ -91,13 +90,6 @@ function weather_all.async(format, warg, callback)
     spawn.easy_async("curl -fs " .. url,
                      function (...) callback(parse(...)) end)
 end
-
-local function worker(format, warg)
-    local ret
-    weather_all.async(format, warg, function (weather) ret = weather end)
-    while ret == nil do end
-    return ret
-end
 -- }}}
 
-return setmetatable(weather_all, { __call = function(_, ...) return worker(...) end })
+return helpers.setasyncall(weather_all)