diff --git a/GPy/inference/likelihoods.py b/GPy/inference/likelihoods.py
index 53dd4248..098e525a 100644
--- a/GPy/inference/likelihoods.py
+++ b/GPy/inference/likelihoods.py
@@ -102,3 +102,5 @@ class probit(likelihood):
     def _log_likelihood_gradients():
         raise NotImplementedError
 
+class poisson(likelihood):
+    pass