1 files changed, 4 insertions, 4 deletions
diff --git a/c++/src/H5DataType.cpp b/c++/src/H5DataType.cpp
index afc5678..a435b4e 100644
--- a/c++/src/H5DataType.cpp
+++ b/c++/src/H5DataType.cpp
@@ -53,7 +53,7 @@ namespace H5 {
 ///\brief	Default constructor: Creates a stub datatype
 // Programmer	Binh-Minh Ribler - 2000
 //--------------------------------------------------------------------------
-DataType::DataType() : H5Object(), id(0) {}
+DataType::DataType() : H5Object(), id(H5I_INVALID_HID) {}
 
 //--------------------------------------------------------------------------
 // Function:	DataType overloaded constructor
@@ -105,7 +105,7 @@ DataType::DataType( const H5T_class_t type_class, size_t size ) : H5Object()
 //	Jul, 2008
 //		Added for application convenience.
 //--------------------------------------------------------------------------
-DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(0)
+DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(H5I_INVALID_HID)
 {
     id = H5Location::p_dereference(loc.getId(), ref, ref_type, plist, "constructor - by dereference");
 }
@@ -124,7 +124,7 @@ DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type,
 //	Jul, 2008
 //		Added for application convenience.
 //--------------------------------------------------------------------------
-DataType::DataType(const Attribute& attr, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(0)
+DataType::DataType(const Attribute& attr, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(H5I_INVALID_HID)
 {
     id = H5Location::p_dereference(attr.getId(), ref, ref_type, plist, "constructor - by dereference");
 }
@@ -710,7 +710,7 @@ void DataType::close()
 	    throw DataTypeIException(inMemFunc("close"), "H5Tclose failed");
 	}
 	// reset the id
-	id = 0;
+	id = H5I_INVALID_HID;
     }
 }