diff --git a/include/asm-sparc64/sparsemem.h b/include/asm-sparc64/sparsemem.h
index 411e0e255cf3..77bcd2bfa53c 100644
--- a/include/asm-sparc64/sparsemem.h
+++ b/include/asm-sparc64/sparsemem.h
@@ -4,8 +4,8 @@
 #ifdef __KERNEL__
 
 #define SECTION_SIZE_BITS       31
-#define MAX_PHYSADDR_BITS       41
-#define MAX_PHYSMEM_BITS        41
+#define MAX_PHYSADDR_BITS       42
+#define MAX_PHYSMEM_BITS        42
 
 #endif /* !(__KERNEL__) */