diff --git a/tools/run_tests/sanity/core_banned_functions.py b/tools/run_tests/sanity/core_banned_functions.py
index 5340cc87ce1..7804dd0fe52 100755
--- a/tools/run_tests/sanity/core_banned_functions.py
+++ b/tools/run_tests/sanity/core_banned_functions.py
@@ -55,6 +55,7 @@ BANNED_EXCEPT = {
     "grpc_call_cancel(": ["src/core/lib/surface/call.cc"],
     "grpc_channel_destroy(": [
         "src/core/lib/surface/channel.cc",
+        "src/core/lib/surface/legacy_channel.cc",
         "src/core/tsi/alts/handshaker/alts_shared_resource.cc",
     ],
     "grpc_closure_create(": [