diff --git a/include/btree.h b/include/btree.h
new file mode 100644
index 0000000..5bdf95e
--- /dev/null
+++ b/include/btree.h
@@ -0,0 +1,11 @@
+#ifndef BTREE_H
+#define BTREE_H
+
+typedef struct bTreeHeader {
+  uInt32 treeDepth;
+  uInt32 treeWidth;
+  uInt32 treeLeafCount;
+  uInt32 firstDeleted;
+} bTreeHeader; // bTreeHeader
+
+#endif /* !BTREE_H */