diff --git a/GPy/inference/latent_function_inference/var_dtc.py b/GPy/inference/latent_function_inference/var_dtc.py
index d61e7f0f..eaa02009 100644
--- a/GPy/inference/latent_function_inference/var_dtc.py
+++ b/GPy/inference/latent_function_inference/var_dtc.py
@@ -21,7 +21,7 @@ class VarDTC(LatentFunctionInference):
     For efficiency, we sometimes work with the cholesky of Y*Y.T. To save repeatedly recomputing this, we cache it.
 
     """
-    const_jitter = 1e-6
+    const_jitter = 1e-10
     def __init__(self, limit=1):
         #self._YYTfactor_cache = caching.cache()
         from ...util.caching import Cacher