diff --git a/libs/nativewindow/include/apex/window.h b/libs/nativewindow/include/apex/window.h
new file mode 100644
index 0000000..0260cbc
--- /dev/null
+++ b/libs/nativewindow/include/apex/window.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright 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.
+ */
+
+#pragma once
+
+#include <nativebase/nativebase.h>
+
+// apex is a superset of the NDK
+#include <android/native_window.h>
+
+__BEGIN_DECLS
+
+/**
+ * Retrieves how long it took for the last time a buffer was dequeued.
+ *
+ * \return a negative value on error, otherwise returns the duration in
+ * microseconds.
+ */
+int ANativeWindow_getLastDequeueDuration(ANativeWindow* window);
+
+__END_DECLS
diff --git a/libs/nativewindow/include/system/window.h b/libs/nativewindow/include/system/window.h
index 8cbf0a4..78354bb 100644
--- a/libs/nativewindow/include/system/window.h
+++ b/libs/nativewindow/include/system/window.h
@@ -41,7 +41,8 @@
 #include <unistd.h>
 #include <stdbool.h>
 
-// system/window.h is a superset of the vndk
+// system/window.h is a superset of the vndk and apex apis
+#include <apex/window.h>
 #include <vndk/window.h>