diff --git a/arch/arm/mach-sa1100/assabet.c b/arch/arm/mach-sa1100/assabet.c
index a599bb0..c58f12b 100644
--- a/arch/arm/mach-sa1100/assabet.c
+++ b/arch/arm/mach-sa1100/assabet.c
@@ -26,6 +26,7 @@
 #include <asm/irq.h>
 #include <asm/setup.h>
 #include <asm/page.h>
+#include <asm/pgtable-hwdef.h>
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>