diff --git a/grudge/symbolic/operators.py b/grudge/symbolic/operators.py
index 52dc963c10eeb14c309b0d80e0b2ab9a2f4a5569..b57f22fd3b9fdb412c13fd01df5adc4045e0ea6c 100644
--- a/grudge/symbolic/operators.py
+++ b/grudge/symbolic/operators.py
@@ -177,7 +177,7 @@ class InterpolationOperator(ProjectionOperator):
         from warnings import warn
         warn("'InterpolationOperator' is deprecated, "
                 "use 'ProjectionOperator' instead.",
-                DeprecationWarning, stacklevel=1)
+                DeprecationWarning, stacklevel=2)
 
         super(InterpolationOperator, self).__init__(dd_in, dd_out)