diff --git a/DeviceAdapters/ThorlabsUSBCamera/ThorlabsUSBCamera.cpp b/DeviceAdapters/ThorlabsUSBCamera/ThorlabsUSBCamera.cpp
index d541fd0c6..54526bdbe 100644
--- a/DeviceAdapters/ThorlabsUSBCamera/ThorlabsUSBCamera.cpp
+++ b/DeviceAdapters/ThorlabsUSBCamera/ThorlabsUSBCamera.cpp
@@ -565,6 +565,8 @@ int ThorlabsUSBCam::StopSequenceAcquisition()
    int ret = is_StopLiveVideo(camHandle_, IS_DONT_WAIT);
    if (ret != IS_SUCCESS)
       LogMessage("Camera failed to stop live video.");
+   if (hEvent)
+      SetEvent(hEvent);
 
    if (!thd_->IsStopped()) {
       thd_->Stop();