diff --git a/src/platforms/px4_time.h b/src/platforms/px4_time.h
index ea9713b26d..25ec36ccea 100644
--- a/src/platforms/px4_time.h
+++ b/src/platforms/px4_time.h
@@ -9,7 +9,13 @@
 #define clockid_t int
 #endif
 
+#if defined(__PX4_POSIX) || defined(__PX4_QURT)
+__BEGIN_DECLS
 __EXPORT int px4_clock_gettime(clockid_t clk_id, struct timespec *tp);
+__END_DECLS
+#else
+#define px4_clock_gettime system_clock_gettime
+#endif
 
 #if defined(ENABLE_LOCKSTEP_SCHEDULER) || defined(__PX4_QURT)