diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index 50f3c297e858..fe00b2feb591 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -147,6 +147,9 @@ self: super:
 
   libXdmcp = super.libXdmcp.overrideAttrs (attrs: {
     outputs = [ "out" "dev" "doc" ];
+    meta = attrs.meta // {
+      pkgConfigModules = [ "xdmcp" ];
+    };
   });
 
   libXfont = super.libXfont.overrideAttrs (attrs: {