diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7c92e423bbc..3c08f0876b3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22313,6 +22313,7 @@ in
 
   meme = callPackage ../applications/graphics/meme { };
 
+  # Needs qtwebkit which is broken on qt5.15
   mendeley = libsForQt514.callPackage ../applications/office/mendeley {
     gconf = pkgs.gnome2.GConf;
   };