diff --git a/src/osgPlugins/txp/trpage_warchive.cpp b/src/osgPlugins/txp/trpage_warchive.cpp
index 94c483398..e39b04da4 100644
--- a/src/osgPlugins/txp/trpage_warchive.cpp
+++ b/src/osgPlugins/txp/trpage_warchive.cpp
@@ -960,6 +960,7 @@ void trpgwGeomHelper::init(trpgWriteBuffer *ibuf,int dtype)
     dataType = dtype;
     zmin = 1e12;
     zmax = -1e12;
+    mode = 0;
 }
 // Reset back to a clean state (except for the buffer)
 void trpgwGeomHelper::Reset()