diff --git a/React/Base/RCTModuleData.mm b/React/Base/RCTModuleData.mm
index cc70c13e1..e4254d0c2 100644
--- a/React/Base/RCTModuleData.mm
+++ b/React/Base/RCTModuleData.mm
@@ -214,6 +214,7 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init);
 
 - (BOOL)hasInstance
 {
+  std::unique_lock<std::mutex> lock(_instanceLock);
   return _instance != nil;
 }