diff --git a/folly/experimental/fibers/Fiber.cpp b/folly/experimental/fibers/Fiber.cpp
index 3b5e01c..19d4b19 100644
--- a/folly/experimental/fibers/Fiber.cpp
+++ b/folly/experimental/fibers/Fiber.cpp
@@ -23,7 +23,6 @@
 #include <cstring>
 #include <stdexcept>
 
-#include <folly/CPortability.h>
 #include <folly/Likely.h>
 #include <folly/Portability.h>
 #include <folly/experimental/fibers/BoostContextCompatibility.h>
@@ -78,8 +77,6 @@ Fiber::Fiber(FiberManager& fiberManager) :
   fcontext_ = makeContext(limit, size, &Fiber::fiberFuncHelper);
 }
 
-// It is necessary to disable ASAN because this function changes fiber's stack.
-FOLLY_DISABLE_ADDRESS_SANITIZER
 void Fiber::init(bool recordStackUsed) {
   recordStackUsed_ = recordStackUsed;
   if (UNLIKELY(recordStackUsed_ && !stackFilledWithMagic_)) {
diff --git a/folly/experimental/fibers/Fiber.h b/folly/experimental/fibers/Fiber.h
index 2c56efa..b0b63b6 100644
--- a/folly/experimental/fibers/Fiber.h
+++ b/folly/experimental/fibers/Fiber.h
@@ -21,6 +21,7 @@
 #include <boost/context/all.hpp>
 #include <boost/version.hpp>
 #include <folly/AtomicLinkedList.h>
+#include <folly/CPortability.h>
 #include <folly/IntrusiveList.h>
 #include <folly/experimental/fibers/BoostContextCompatibility.h>
 
@@ -69,7 +70,9 @@ class Fiber {
   friend class FiberManager;
 
   explicit Fiber(FiberManager& fiberManager);
-  void init(bool recordStackUsed);
+
+  // It is necessary to disable ASAN because init() changes the fiber's stack.
+  void init(bool recordStackUsed) FOLLY_DISABLE_ADDRESS_SANITIZER;
 
   template <typename F>
   void setFunction(F&& func);