Index: kernel/generic/src/mm/backend_phys.c
===================================================================
--- kernel/generic/src/mm/backend_phys.c	(revision f651e80e2ba6968d9e184dd8ca7fa6e5b779caaf)
+++ kernel/generic/src/mm/backend_phys.c	(revision 079f4402537f59cd1c6af7767c212795b7015ffd)
@@ -40,4 +40,5 @@
 #include <arch/types.h>
 #include <mm/as.h>
+#include <mm/page.h>
 #include <mm/frame.h>
 #include <mm/slab.h>