diff --git a/RTCP/CNProc/src/CN_Processing.cc b/RTCP/CNProc/src/CN_Processing.cc
index 22700194bed612256a3d8785aacb87e71c4a94a0..1e3747417cc099f687c51eca5ed6b5a74cd6ee45 100644
--- a/RTCP/CNProc/src/CN_Processing.cc
+++ b/RTCP/CNProc/src/CN_Processing.cc
@@ -796,6 +796,8 @@ template <typename SAMPLE_TYPE> void CN_Processing<SAMPLE_TYPE>::finishSendingBe
 
 template <typename SAMPLE_TYPE> void CN_Processing<SAMPLE_TYPE>::receiveBeam(unsigned stream)
 {
+  (void)stream;
+
 #if defined HAVE_MPI
   unsigned nrSubbands= itsTranspose2Logic.nrSubbands( stream );