diff --git a/rtc_base/time_utils.h b/rtc_base/time_utils.h
index 0da369fac3..872ae4a8bf 100644
--- a/rtc_base/time_utils.h
+++ b/rtc_base/time_utils.h
@@ -129,7 +129,7 @@ int64_t TmToSeconds(const tm& tm);
 // system time is changed, e.g., by some other process calling
 // settimeofday. Always use rtc::TimeMicros(), not this function, for
 // measuring time intervals and timeouts.
-int64_t TimeUTCMicros();
+RTC_EXPORT int64_t TimeUTCMicros();
 
 // Return the number of milliseconds since January 1, 1970, UTC.
 // See above.