diff --git a/loopy/diagnostic.py b/loopy/diagnostic.py
index 2ea1bd40e540b24d5a08e4136ab603d6c5a422a1..c1d0e03633772bb7e3f86807f579e2b33793e6aa 100644
--- a/loopy/diagnostic.py
+++ b/loopy/diagnostic.py
@@ -23,6 +23,9 @@ THE SOFTWARE.
 """
 
 
+from pytools import MovedFunctionDeprecationWrapper
+
+
 # {{{ warnings
 
 class LoopyWarningBase(UserWarning):
@@ -47,7 +50,7 @@ class WriteRaceConditionWarning(LoopyWarning):
 # }}}
 
 
-def warn(kernel, id, text, type=LoopyWarning):
+def warn_with_kernel(kernel, id, text, type=LoopyWarning):
     from fnmatch import fnmatchcase
     for sw in kernel.silenced_warnings:
         if fnmatchcase(id, sw):
@@ -60,6 +63,9 @@ def warn(kernel, id, text, type=LoopyWarning):
     warn(text, type)
 
 
+warn = MovedFunctionDeprecationWrapper(warn_with_kernel)
+
+
 # {{{ errors
 
 class LoopyError(RuntimeError):