Index: /trunk/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c	(revision 39702)
+++ /trunk/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c	(revision 39703)
@@ -818,5 +818,6 @@
 #endif
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 5)
+/* As usual, RHEL 3 had pte_offset_map earlier. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 5) || defined(pte_offset_map)
     pEntry = pte_offset_map(&u.Middle, ulAddr);
 #else