diff --git a/arch/microblaze/include/asm/system.h b/arch/microblaze/include/asm/system.h
index 3107748..050a8b4 100644
--- a/arch/microblaze/include/asm/system.h
+++ b/arch/microblaze/include/asm/system.h
@@ -23,6 +23,8 @@
 #endif
 #include <asm/ptrace.h>
 
+#define MMU_SECTION_SIZE	(1 * 1024 * 1024)
+
 #define prepare_to_switch()	do { } while (0)
 
 /*