diff --git a/package/android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraScheduler.cpp b/package/android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraScheduler.cpp
index 77a28a6..816b0af 100644
--- a/package/android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraScheduler.cpp
+++ b/package/android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraScheduler.cpp
@@ -15,6 +15,7 @@ TSelf JVisionCameraScheduler::initHybrid(jni::alias_ref<jhybridobject> jThis) {
 }
 
 void JVisionCameraScheduler::dispatchAsync(const std::function<void()>& job) {
+  std::unique_lock<std::mutex> lock(_mutex);
   // 1. add job to queue
   _jobs.push(job);
   scheduleTrigger();