diff --git a/api/transport/BUILD.gn b/api/transport/BUILD.gn
index 12a1f57066..84a0968ee9 100644
--- a/api/transport/BUILD.gn
+++ b/api/transport/BUILD.gn
@@ -53,6 +53,7 @@ rtc_library("field_trial_based_config") {
   ]
   deps = [
     "../../api:field_trials_registry",
+    "../../rtc_base/system:rtc_export",
     "../../system_wrappers:field_trial",
   ]
   absl_deps = [ "//third_party/abseil-cpp/absl/strings" ]
diff --git a/api/transport/field_trial_based_config.h b/api/transport/field_trial_based_config.h
index d47140e579..441f89e51d 100644
--- a/api/transport/field_trial_based_config.h
+++ b/api/transport/field_trial_based_config.h
@@ -14,10 +14,11 @@
 
 #include "absl/strings/string_view.h"
 #include "api/field_trials_registry.h"
+#include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
 // Implementation using the field trial API fo the key value lookup.
-class FieldTrialBasedConfig : public FieldTrialsRegistry {
+class RTC_EXPORT FieldTrialBasedConfig : public FieldTrialsRegistry {
  private:
   std::string GetValue(absl::string_view key) const override;
 };