diff --git a/pkgs/by-name/th/the-powder-toy/package.nix b/pkgs/by-name/th/the-powder-toy/package.nix
index b0791b66ccb5..5e752571669e 100644
--- a/pkgs/by-name/th/the-powder-toy/package.nix
+++ b/pkgs/by-name/th/the-powder-toy/package.nix
@@ -8,6 +8,7 @@
   jsoncpp,
   lib,
   libpng,
+  libX11,
   lua,
   luajit,
   meson,
@@ -42,6 +43,7 @@ stdenv.mkDerivation rec {
     fftwFloat
     jsoncpp
     libpng
+    libX11
     lua
     luajit
     SDL2