diff --git a/GPy/util/decorators.py b/GPy/util/decorators.py
index 2cdf78f1..c8aa08a2 100644
--- a/GPy/util/decorators.py
+++ b/GPy/util/decorators.py
@@ -2,6 +2,11 @@ import numpy as np
 from functools import wraps
 
 def silence_errors(f):
+    """
+    This wraps a function and it silences numpy errors that
+    happen during the execution. After the function has exited, it restores
+    the previous state of the warnings.
+    """
     @wraps(f)
     def wrapper(*args, **kwds):
         status = np.seterr(all='ignore')