diff --git a/GPy/kern/src/standard_periodic.py b/GPy/kern/src/standard_periodic.py
index b020d8e7..d45e8d16 100644
--- a/GPy/kern/src/standard_periodic.py
+++ b/GPy/kern/src/standard_periodic.py
@@ -165,4 +165,6 @@ class StdPeriodic(Kern):
     
     def gradients_X_diag(self, dL_dKdiag, X):
         return np.zeros(X.shape)
-    
\ No newline at end of file
+    
+    def input_sensitivity(self, summarize=True):
+        return self.variance*np.ones(self.input_dim)/self.lengthscale**2
\ No newline at end of file