diff --git a/pkgs/applications/networking/dropbox/default.nix b/pkgs/applications/networking/dropbox/default.nix
index 58f55f0b9c150..330774a92817f 100644
--- a/pkgs/applications/networking/dropbox/default.nix
+++ b/pkgs/applications/networking/dropbox/default.nix
@@ -43,7 +43,7 @@ buildFHSEnv {
   unsharePid = false;
 
   targetPkgs = pkgs: with pkgs; with xorg; [
-    libICE libSM libX11 libXcomposite libXdamage libXext libXfixes libXrender
+    libICE libSM libX11 libXcomposite libXdamage libXext libXfixes libXrender libXmu
     libXxf86vm libGL libxcb xkeyboardconfig
     curl dbus firefox-bin fontconfig freetype gcc glib gnutar libxml2 libxslt
     procps zlib mesa libxshmfence libpthreadstubs libappindicator