diff --git a/versioning/BRM/slavecomm.cpp b/versioning/BRM/slavecomm.cpp
index 4414540a5..3e056908d 100644
--- a/versioning/BRM/slavecomm.cpp
+++ b/versioning/BRM/slavecomm.cpp
@@ -1317,6 +1317,8 @@ void SlaveComm::do_mergeExtentsMaxMin(ByteStream& msg)
     msg >> tmp32;
     cpMaxMin.newExtent = tmp32;
 
+    // avoid warrning
+    cpMaxMin.colWidth = 0;
     cpMap[startLbid] = cpMaxMin;
 
     if (printOnly)