diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc b/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
index 4619f6f7c690..e518708c0665 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_fuchsia.cc
@@ -91,6 +91,7 @@ void MaybeReexec() {}
 void PrepareForSandboxing(__sanitizer_sandbox_arguments *args) {}
 void DisableCoreDumperIfNecessary() {}
 void InstallDeadlySignalHandlers(SignalHandlerType handler) {}
+void StartReportDeadlySignal() {}
 void SetAlternateSignalStack() {}
 void UnsetAlternateSignalStack() {}
 void InitTlsSize() {}
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_win.cc b/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
index 4d68f56100f4..5a78b64c6f15 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_win.cc
@@ -858,6 +858,10 @@ void InstallDeadlySignalHandlers(SignalHandlerType handler) {
   // FIXME: Decide what to do on Windows.
 }
 
+void StartReportDeadlySignal() {
+  // FIXME: Decide what to do on Windows.
+}
+
 HandleSignalMode GetHandleSignalMode(int signum) {
   // FIXME: Decide what to do on Windows.
   return kHandleSignalNo;