diff --git a/IO/LANLX3D/X3D_reader.hxx b/IO/LANLX3D/X3D_reader.hxx
index f6ed02b99be26d775b40de581510b5e3dc00bdb3..4a469549fe1ffe08fb4e21a4fb0b8bcd8d9db895 100644
--- a/IO/LANLX3D/X3D_reader.hxx
+++ b/IO/LANLX3D/X3D_reader.hxx
@@ -87,7 +87,7 @@ public:
       \param filename name of X3D file
       \param version number
   */
-  explicit Reader(const std::string& filename, const Version version = Version::v1_3);
+  explicit Reader(const std::string& filename, Version version = Version::v1_3);
 
   // Header Data Block
   Header header() const { return size; }