diff --git a/DeviceAdapters/NIDAQ/NIDigitalOutputPort.cpp b/DeviceAdapters/NIDAQ/NIDigitalOutputPort.cpp
index 627f4707c..b608d3187 100644
--- a/DeviceAdapters/NIDAQ/NIDigitalOutputPort.cpp
+++ b/DeviceAdapters/NIDAQ/NIDigitalOutputPort.cpp
@@ -99,6 +99,8 @@ int DigitalOutputPort::Initialize()
    GetHub()->StopDOBlankingAndSequence(portWidth_);
 
    // Some cards lie about their portwidth, if blanking does not work, try 32 bits
+   // Workaround for possible DAQmx bug on USB-6341; see
+   // https://forums.ni.com/t5/Multifunction-DAQ/problem-with-correlated-DIO-on-USB-6341/td-p/3344066
    if (!supportsBlankingAndSequencing_)
    {
       uInt32 oldPortWidth = portWidth_;