diff --git a/include/private/android_filesystem_config.h b/include/private/android_filesystem_config.h
index 0c071ca..9046fbe 100644
--- a/include/private/android_filesystem_config.h
+++ b/include/private/android_filesystem_config.h
@@ -26,7 +26,7 @@
 #include <sys/types.h>
 #include <stdint.h>
 
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
 #include <linux/capability.h>
 #else
 #include "android_filesystem_capability.h"
diff --git a/include/utils/AndroidThreads.h b/include/utils/AndroidThreads.h
index aad1e82..4c2dd49 100644
--- a/include/utils/AndroidThreads.h
+++ b/include/utils/AndroidThreads.h
@@ -73,7 +73,7 @@
 // ------------------------------------------------------------------
 // Extra functions working with raw pids.
 
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
 // Change the priority AND scheduling group of a particular thread.  The priority
 // should be one of the ANDROID_PRIORITY constants.  Returns INVALID_OPERATION
 // if the priority set failed, else another value if just the group set failed;
diff --git a/include/utils/Mutex.h b/include/utils/Mutex.h
index 757519b..f027c79 100644
--- a/include/utils/Mutex.h
+++ b/include/utils/Mutex.h
@@ -59,7 +59,7 @@
     // lock if possible; returns 0 on success, error otherwise
     status_t    tryLock();
 
-#if HAVE_ANDROID_OS
+#if defined(__ANDROID__)
     // lock the mutex, but don't wait longer than timeoutMilliseconds.
     // Returns 0 on success, TIMED_OUT for failure due to timeout expiration.
     //
@@ -128,7 +128,7 @@
 inline status_t Mutex::tryLock() {
     return -pthread_mutex_trylock(&mMutex);
 }
-#if HAVE_ANDROID_OS
+#if defined(__ANDROID__)
 inline status_t Mutex::timedLock(nsecs_t timeoutNs) {
     const struct timespec ts = {
         /* .tv_sec = */ static_cast<time_t>(timeoutNs / 1000000000),
diff --git a/include/utils/Thread.h b/include/utils/Thread.h
index 28839fd..1532b7e 100644
--- a/include/utils/Thread.h
+++ b/include/utils/Thread.h
@@ -70,7 +70,7 @@
     // Indicates whether this thread is running or not.
             bool        isRunning() const;
 
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
     // Return the thread's kernel ID, same as the thread itself calling gettid(),
     // or -1 if the thread is not running.
             pid_t       getTid() const;
@@ -101,7 +101,7 @@
     volatile bool           mExitPending;
     volatile bool           mRunning;
             sp<Thread>      mHoldSelf;
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
     // legacy for debugging, not used by getTid() as it is set by the child thread
     // and so is not initialized until the child reaches that point
             pid_t           mTid;
diff --git a/include/utils/Trace.h b/include/utils/Trace.h
index 6ee343d..6ba68f6 100644
--- a/include/utils/Trace.h
+++ b/include/utils/Trace.h
@@ -17,7 +17,7 @@
 #ifndef ANDROID_TRACE_H
 #define ANDROID_TRACE_H
 
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
 
 #include <fcntl.h>
 #include <stdint.h>
@@ -59,11 +59,11 @@
 
 }; // namespace android
 
-#else // HAVE_ANDROID_OS
+#else // !__ANDROID__
 
 #define ATRACE_NAME(...)
 #define ATRACE_CALL()
 
-#endif // HAVE_ANDROID_OS
+#endif // __ANDROID__
 
 #endif // ANDROID_TRACE_H