diff --git a/benchmarks/Android.bp b/benchmarks/Android.bp
index f2ab32a..70f7bab 100644
--- a/benchmarks/Android.bp
+++ b/benchmarks/Android.bp
@@ -28,6 +28,7 @@
     srcs: [
         "bionic_benchmarks.cpp",
         "atomic_benchmark.cpp",
+        "ctype_benchmark.cpp",
         "get_heap_size_benchmark.cpp",
         "inttypes_benchmark.cpp",
         "malloc_benchmark.cpp",
diff --git a/benchmarks/ctype_benchmark.cpp b/benchmarks/ctype_benchmark.cpp
new file mode 100644
index 0000000..3c7f48d
--- /dev/null
+++ b/benchmarks/ctype_benchmark.cpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+
+#include <benchmark/benchmark.h>
+#include "util.h"
+
+BIONIC_TRIVIAL_BENCHMARK(BM_ctype_tolower_y, tolower('X'));
+BIONIC_TRIVIAL_BENCHMARK(BM_ctype_tolower_n, tolower('x'));
+
+BIONIC_TRIVIAL_BENCHMARK(BM_ctype_toupper_y, toupper('x'));
+BIONIC_TRIVIAL_BENCHMARK(BM_ctype_toupper_n, toupper('X'));