diff --git a/servers/vm/pagerange.h b/servers/vm/pagerange.h
new file mode 100644
index 000000000..edf84e9c2
--- /dev/null
+++ b/servers/vm/pagerange.h
@@ -0,0 +1,24 @@
+
+
+#include <minix/callnr.h>
+#include <minix/com.h>
+#include <minix/config.h>
+#include <minix/const.h>
+#include <minix/ds.h>
+#include <minix/endpoint.h>
+#include <minix/keymap.h>
+#include <minix/minlib.h>
+#include <minix/type.h>
+#include <minix/ipc.h>
+#include <minix/sysutil.h>
+#include <minix/syslib.h>
+#include <minix/const.h>
+
+typedef struct pagerange {
+	phys_bytes	addr;	/* in pages */
+	phys_bytes	size;	/* in pages */
+
+	/* AVL fields */
+	struct pagerange *less, *greater;	/* children */
+	int		factor;	/* AVL balance factor */
+} pagerange_t;