diff --git a/src/ca/searchTimer.cpp b/src/ca/searchTimer.cpp
index e83caddef..5600e2fea 100644
--- a/src/ca/searchTimer.cpp
+++ b/src/ca/searchTimer.cpp
@@ -93,7 +93,7 @@ void searchTimer::beaconAnomalyNotify (
 
 // lock must be applied
 void searchTimer::recomputeTimerPeriod ( 
-    epicsGuard < udpMutex > & guard, unsigned minRetryNew )
+    epicsGuard < udpMutex > & guard, unsigned minRetryNew ) // X aCC 431
 {
     this->minRetry = minRetryNew;
 
diff --git a/src/ca/udpiiu.cpp b/src/ca/udpiiu.cpp
index be885bab3..da28b51aa 100644
--- a/src/ca/udpiiu.cpp
+++ b/src/ca/udpiiu.cpp
@@ -1023,7 +1023,7 @@ void udpiiu::beaconAnomalyNotify ( const epicsTime & currentTime )
     this->pSearchTmr->beaconAnomalyNotify ( guard, currentTime, delay );
 }
 
-bool udpiiu::searchMsg ( epicsGuard < udpMutex > & guard, 
+bool udpiiu::searchMsg ( epicsGuard < udpMutex > & /* guard */, 
                         unsigned & retryNoForThisChannel )
 {
     bool success;