diff --git a/src/H5BlockPrivate.h b/src/H5BlockPrivate.h
index 1e4e7c5..5a011be 100644
--- a/src/H5BlockPrivate.h
+++ b/src/H5BlockPrivate.h
@@ -1,4 +1,6 @@
 #ifndef __H5BLOCKPRIVATE_H
 #define __H5BLOCKPRIVATE_H
 
+#define H5BLOCK_GROUP_NAME	"Block"
+
 #endif