diff --git a/MQ/monitor/CbmDeviceMonitorReqT0.cxx b/MQ/monitor/CbmDeviceMonitorReqT0.cxx
index 2b84a993043b89e6c811da425527159f1d4be29c..0a14253a1ab338327c8f094f09c84dc977eada6b 100644
--- a/MQ/monitor/CbmDeviceMonitorReqT0.cxx
+++ b/MQ/monitor/CbmDeviceMonitorReqT0.cxx
@@ -76,7 +76,7 @@ try {
 
   if ("" == fsTsBlockName) {
     //
-    LOG(info) << "Requesting TS using the SysId: 0x" << std::hex << kusSysId << std::dec;
+    LOG(info) << "Requesting TS using the SysId: 0x" << std::hex << static_cast<int>(kusSysId) << std::dec;
   }
   else {
     //