diff --git a/system_wrappers/BUILD.gn b/system_wrappers/BUILD.gn
index 913073902f..1ff2ddd4fd 100644
--- a/system_wrappers/BUILD.gn
+++ b/system_wrappers/BUILD.gn
@@ -37,6 +37,7 @@ rtc_library("system_wrappers") {
     "../rtc_base:checks",
     "../rtc_base/synchronization:rw_lock_wrapper",
     "../rtc_base/system:arch",
+    "../rtc_base/system:rtc_export",
     "//third_party/abseil-cpp/absl/types:optional",
   ]
 
diff --git a/system_wrappers/include/clock.h b/system_wrappers/include/clock.h
index 94c87463d8..8eac3d18b3 100644
--- a/system_wrappers/include/clock.h
+++ b/system_wrappers/include/clock.h
@@ -17,6 +17,7 @@
 
 #include "api/units/timestamp.h"
 #include "rtc_base/synchronization/rw_lock_wrapper.h"
+#include "rtc_base/system/rtc_export.h"
 #include "system_wrappers/include/ntp_time.h"
 
 namespace webrtc {
@@ -28,7 +29,7 @@ const uint32_t kNtpJan1970 = 2208988800UL;
 const double kMagicNtpFractionalUnit = 4.294967296E+9;
 
 // A clock interface that allows reading of absolute and relative timestamps.
-class Clock {
+class RTC_EXPORT Clock {
  public:
   virtual ~Clock() {}
   // Return a timestamp relative to an unspecified epoch.