diff --git a/themes/xresources/assets.lua b/themes/xresources/assets.lua
index 988030786..e7a7db722 100644
--- a/themes/xresources/assets.lua
+++ b/themes/xresources/assets.lua
@@ -47,9 +47,10 @@ function theme_assets.taglist_squares_unsel(size, fg)
 end
 
 
-function theme_assets.wallpaper(bg, fg, alt_fg)
-    local height = screen[1].workarea.height
-    local width = screen[1].workarea.width
+function theme_assets.wallpaper(bg, fg, alt_fg, s)
+    s = s or screen.primary
+    local height = s.workarea.height
+    local width = s.workarea.width
     local img = cairo.ImageSurface(cairo.Format.ARGB32, width, height)
     local cr = cairo.Context(img)
 
diff --git a/themes/xresources/theme.lua b/themes/xresources/theme.lua
index 507914798..a1cea1a23 100644
--- a/themes/xresources/theme.lua
+++ b/themes/xresources/theme.lua
@@ -91,9 +91,9 @@ local wallpaper_alt_fg = xrdb.color12
 if not is_dark_bg then
     wallpaper_bg, wallpaper_fg = wallpaper_fg, wallpaper_bg
 end
-theme.wallpaper = theme_assets.wallpaper(
-    wallpaper_bg, wallpaper_fg, wallpaper_alt_fg
-)
+theme.wallpaper = function(s)
+    return theme_assets.wallpaper(wallpaper_bg, wallpaper_fg, wallpaper_alt_fg, s)
+end
 
 return theme