diff --git a/src/common/intl.cpp b/src/common/intl.cpp
index 8d5410623a..bf24c944ed 100644
--- a/src/common/intl.cpp
+++ b/src/common/intl.cpp
@@ -1120,7 +1120,7 @@ bool wxMsgCatalogFile::Load(const wxChar *szDirPrefix, const wxChar *szName0,
     return false;
 
   // get the file size
-  size_t nSize = fileMsg.Length();
+  wxFileOffset nSize = fileMsg.Length();
   if ( nSize == wxInvalidOffset )
     return false;