diff --git a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
index 78f0a9c31fc..0e052e847cc 100644
--- a/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pybitmessage/default.nix
@@ -12,7 +12,7 @@ pythonPackages.buildPythonApplication rec {
     sha256 = "04sgns9qczzw2152gqdr6bjyy4fmgs26cz8n3qck94l0j51rxhz8";
   };
 
-  propagatedBuildInputs = with pythonPackages; [ msgpack pyqt4 ] ++ [ openssl ];
+  propagatedBuildInputs = with pythonPackages; [ msgpack pyqt4 numpy pyopencl ] ++ [ openssl ];
 
   preConfigure = ''
     # Remove interaction and misleading output