diff --git a/compiler-rt/lib/hwasan/hwasan_poisoning.cpp b/compiler-rt/lib/hwasan/hwasan_poisoning.cpp
--- a/compiler-rt/lib/hwasan/hwasan_poisoning.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_poisoning.cpp
@@ -26,3 +26,8 @@
 }
 
 }  // namespace __hwasan
+
+// --- Implementation of LSan-specific functions --- {{{1
+namespace __lsan {
+bool WordIsPoisoned(uptr addr) { return false; }
+}  // namespace __lsan