diff --git a/tools/run_tests/sanity/banned_functions.py b/tools/run_tests/sanity/banned_functions.py
index 5fba297e21c..2375503454b 100755
--- a/tools/run_tests/sanity/banned_functions.py
+++ b/tools/run_tests/sanity/banned_functions.py
@@ -50,7 +50,7 @@ DEPRECATED_FUNCTION_TEMP_ALLOW_LIST = {
         "./src/ruby/ext/grpc/rb_grpc_imports.generated.h",
         "./test/core/end2end/tests/no_logging.cc",
     ],
-    "gpr_log_severity_string(": [],
+    "gpr_log_severity_string": [],
     "gpr_log(": [
         "./include/grpc/support/log.h",
         "./src/core/ext/filters/backend_metrics/backend_metric_filter.cc",