diff --git a/rtc_base/platform_thread_types.h b/rtc_base/platform_thread_types.h
index 0bc42eb..6b9101e 100644
--- a/rtc_base/platform_thread_types.h
+++ b/rtc_base/platform_thread_types.h
@@ -25,6 +25,9 @@
 #elif defined(WEBRTC_POSIX)
 #include <pthread.h>
 #include <unistd.h>
+#if defined(WEBRTC_MAC)
+#include <pthread_spis.h>
+#endif
 #endif
 // clang-format on