diff --git a/compiler-rt/lib/lsan/lsan_thread.cpp b/compiler-rt/lib/lsan/lsan_thread.cpp
--- a/compiler-rt/lib/lsan/lsan_thread.cpp
+++ b/compiler-rt/lib/lsan/lsan_thread.cpp
@@ -30,7 +30,7 @@
   return new (mem) ThreadContext(tid);
 }
 
-static const uptr kMaxThreads = 1 << 13;
+static const uptr kMaxThreads = 1 << 22;  // 4M
 static const uptr kThreadQuarantineSize = 64;
 
 void InitializeThreadRegistry() {