diff --git a/pkgs/applications/networking/instant-messengers/twinkle/default.nix b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
index c7f33c1f580..b096023eaa4 100644
--- a/pkgs/applications/networking/instant-messengers/twinkle/default.nix
+++ b/pkgs/applications/networking/instant-messengers/twinkle/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
     [ pkgconfig autoreconfHook commoncpp2 openssl boost libsndfile
-      libxml2 libjpeg readline qt3 perl file
+      libxml2 libjpeg readline qt3 perl file ccrtp
       # optional ? :
       alsaLib speex
       libzrtpcpp xorg.libX11 xorg.libXaw xorg.libICE xorg.libXext