diff --git a/src/lasp/device/lasp_streammgr.cpp b/src/lasp/device/lasp_streammgr.cpp
index e2714d4..dea3662 100644
--- a/src/lasp/device/lasp_streammgr.cpp
+++ b/src/lasp/device/lasp_streammgr.cpp
@@ -240,7 +240,8 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
     devinfo = *devinfo2;
   }
 
-  isInput |= config.monitorOutput && devinfo.hasInternalOutputMonitor;
+  isInput |= (config.monitorOutput && devinfo.hasInternalOutputMonitor);
+  DEBUGTRACE_PRINT(isInput);
 
   bool isDuplex = isInput && isOutput;
 
@@ -284,7 +285,9 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
       _siggen->reset(daq->samplerate());
     }
     outCallback = std::bind(&StreamMgr::outCallback, this, _1);
+    if(!isDuplex) {
     stream_placeholder = std::addressof(_outputStream);
+    }
   }
 
   daq->start(inCallback, outCallback);
@@ -369,10 +372,11 @@ const Daq *StreamMgr::getDaq(StreamType type) const {
     return _inputStream.get();
   } else {
     // Output stream. If input runs in duplex mode, this is also the output
-    // stream. In that case, we return the outputstram
+    // stream. In that case, we return the input stream
     if (_inputStream && _inputStream->duplexMode()) {
       return _inputStream.get();
+    } else {
+      return _outputStream.get();
     }
-    return _outputStream.get();
   }
 }