diff --git a/src/sdr/SDRPostThread.cpp b/src/sdr/SDRPostThread.cpp
index 30944cf..e4a9d2b 100644
--- a/src/sdr/SDRPostThread.cpp
+++ b/src/sdr/SDRPostThread.cpp
@@ -120,7 +120,6 @@ void SDRPostThread::run() {
             
             if (iqVisualQueue != NULL && iqVisualQueue->empty()) {
                 DemodulatorThreadIQData *visualDataOut = visualDataBuffers.getBuffer();
-                visualDataOut->busy_rw.lock();
                 visualDataOut->setRefCount(1);
                 
                 if (num_vis_samples > dataOut.size()) {
@@ -138,7 +137,6 @@ void SDRPostThread::run() {
                 visualDataOut->sampleRate = data_in->sampleRate;
                 visualDataOut->data.assign(dataOut.begin(), dataOut.begin() + num_vis_samples);
                 
-                visualDataOut->busy_rw.unlock();
                 iqVisualQueue->push(visualDataOut);
             }