diff --git a/lib/naughty.lua.in b/lib/naughty.lua.in
index b8fe294a..0aaec1f5 100644
--- a/lib/naughty.lua.in
+++ b/lib/naughty.lua.in
@@ -546,13 +546,15 @@ if capi.dbus then
                 -- 1 -> width, 2 -> height, 3 -> rowstride, 4 -> has alpha
                 -- 5 -> bits per sample, 6 -> channels, 7 -> data
 
-                local imgdata
+                local imgdata = ""
                 -- If has alpha (ARGB32)
                 if hints.icon_data[6] == 4 then
-                    imgdata = hints.icon_data[7]
+                    for i = 1, #hints.icon_data[7], 4 do
+                        imgdata = imgdata .. hints.icon_data[7]:sub(i, i + 2):reverse()
+                        imgdata = imgdata .. hints.icon_data[7]:sub(i + 3, i + 3)
+                    end
                 -- If has not alpha (RGB24)
                 elseif hints.icon_data[6] == 3 then
-                    imgdata = ""
                     for i = 1, #hints.icon_data[7], 3 do
                         imgdata = imgdata .. hints.icon_data[7]:sub(i , i + 2):reverse()
                         imgdata = imgdata .. string.format("%c", 255) -- alpha is 255