diff --git a/pkgs/applications/kde-apps-15.04/default.nix b/pkgs/applications/kde-apps-15.04/default.nix
index 1b92c5dd21d1..59723c9d8353 100644
--- a/pkgs/applications/kde-apps-15.04/default.nix
+++ b/pkgs/applications/kde-apps-15.04/default.nix
@@ -339,7 +339,8 @@ let
       ktp-common-internals = super.ktp-common-internals // {
         buildInputs =
           super.ktp-common-internals.buildInputs
-          ++ (with kf5; [ kdelibs4support kparts ]);
+          ++ (with kf5; [ kdelibs4support kparts ])
+          ++ [ pkgs.libotr ]; # needed for ktp-text-ui
       };
 
       libkdcraw = with pkgs; super.libkdcraw // {