diff --git a/React/Profiler/RCTProfile.h b/React/Profiler/RCTProfile.h
index b0e9cecdb..e47728e2b 100644
--- a/React/Profiler/RCTProfile.h
+++ b/React/Profiler/RCTProfile.h
@@ -187,6 +187,9 @@ typedef struct {
   void (*end_async_section)(uint64_t tag, const char *name, int cookie, size_t numArgs, systrace_arg_t *args);
 
   void (*instant_section)(uint64_t tag, const char *name, char scope);
+
+  void (*begin_async_flow)(uint64_t tag, const char *name, int cookie);
+  void (*end_async_flow)(uint64_t tag, const char *name, int cookie);
 } RCTProfileCallbacks;
 
 RCT_EXTERN void RCTProfileRegisterCallbacks(RCTProfileCallbacks *);
diff --git a/React/Profiler/RCTProfile.m b/React/Profiler/RCTProfile.m
index 6599faea3..56ba31dc8 100644
--- a/React/Profiler/RCTProfile.m
+++ b/React/Profiler/RCTProfile.m
@@ -696,13 +696,15 @@ NSNumber *_RCTProfileBeginFlowEvent(void)
 
   CHECK(@0);
 
+  unsigned int cookie = ++flowID;
+  NSNumber *currentID = @(cookie);
+
   if (callbacks != NULL) {
-    // flow events not supported yet
-    return @0;
+    callbacks->begin_async_flow(1, "flow", cookie);
+    return currentID;
   }
 
   NSTimeInterval time = CACurrentMediaTime();
-  NSNumber *currentID = @(++flowID);
   NSString *threadName = RCTCurrentThreadName();
 
   dispatch_async(RCTProfileGetQueue(), ^{
@@ -725,6 +727,7 @@ void _RCTProfileEndFlowEvent(NSNumber *flowID)
   CHECK();
 
   if (callbacks != NULL) {
+    callbacks->end_async_flow(1, "flow", [flowID integerValue]);
     return;
   }