diff --git a/compiler-rt/lib/tsan/rtl/tsan_interface.h b/compiler-rt/lib/tsan/rtl/tsan_interface.h
--- a/compiler-rt/lib/tsan/rtl/tsan_interface.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_interface.h
@@ -88,6 +88,8 @@
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_ignore_thread_begin();
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_ignore_thread_end();
 
+SANITIZER_INTERFACE_ATTRIBUTE void __tsan_on_thread_idle();
+
 SANITIZER_INTERFACE_ATTRIBUTE
 void *__tsan_external_register_tag(const char *object_type);
 SANITIZER_INTERFACE_ATTRIBUTE
diff --git a/compiler-rt/lib/tsan/rtl/tsan_mman.cpp b/compiler-rt/lib/tsan/rtl/tsan_mman.cpp
--- a/compiler-rt/lib/tsan/rtl/tsan_mman.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_mman.cpp
@@ -15,6 +15,7 @@
 #include "sanitizer_common/sanitizer_common.h"
 #include "sanitizer_common/sanitizer_errno.h"
 #include "sanitizer_common/sanitizer_placement_new.h"
+#include "tsan_interface.h"
 #include "tsan_mman.h"
 #include "tsan_rtl.h"
 #include "tsan_report.h"