diff --git a/sumpy/kernel.py b/sumpy/kernel.py
index 2f5c3356fa094b25999dd59cafb2798793f77ef9..e365f5601bb0999e4352d404b5e55f3cde511763 100644
--- a/sumpy/kernel.py
+++ b/sumpy/kernel.py
@@ -1087,10 +1087,6 @@ class DirectionalDerivative(DerivativeBase):
     def __init__(self, inner_kernel, dir_vec_name=None):
         if dir_vec_name is None:
             dir_vec_name = self.directional_kind + "_derivative_dir"
-        else:
-            from warnings import warn
-            warn("specified the name of the direction vector",
-                    stacklevel=2)
 
         KernelWrapper.__init__(self, inner_kernel)
         self.dir_vec_name = dir_vec_name