diff --git a/base/chrono_utils.cpp b/base/chrono_utils.cpp
index b6bf701..dbe5483 100644
--- a/base/chrono_utils.cpp
+++ b/base/chrono_utils.cpp
@@ -22,7 +22,7 @@
 namespace base {
 
 boot_clock::time_point boot_clock::now() {
-#ifdef __ANDROID__
+#ifdef __linux__
   timespec ts;
   clock_gettime(CLOCK_BOOTTIME, &ts);
   return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
@@ -30,7 +30,7 @@
 #else
   // Darwin does not support clock_gettime.
   return boot_clock::time_point();
-#endif  // __ANDROID__
+#endif  // __linux__
 }
 
 std::ostream& operator<<(std::ostream& os, const Timer& t) {