diff --git a/MAC/APL/PAC/CalServer/src/CalServer.cc b/MAC/APL/PAC/CalServer/src/CalServer.cc
index b98e7b39f9159eb2456781b8483573f77f9c4d81..ae4fac4110a5d2a8b38bb62430587f1bc18debb9 100644
--- a/MAC/APL/PAC/CalServer/src/CalServer.cc
+++ b/MAC/APL/PAC/CalServer/src/CalServer.cc
@@ -629,7 +629,7 @@ GCFEvent::TResult CalServer::handle_cal_start(GCFEvent& e, GCFPortInterface &por
 			specInvCmd.settings()(0).setXSI(SIon);
 			specInvCmd.settings()(0).setYSI(SIon);
 			LOG_DEBUG_STR("NyquistZone = " << start.rcumode()(0).getNyquistZone() 
-							<< " setting spectral inversion " << (SIon) ? "ON" : "OFF");
+							<< " setting spectral inversion " << ((SIon) ? "ON" : "OFF"));
 			m_rspdriver.send(specInvCmd);
 		}
 	}