diff --git a/target-m68k/cpu.h b/target-m68k/cpu.h
index 6bafc40..6f652c5 100644
--- a/target-m68k/cpu.h
+++ b/target-m68k/cpu.h
@@ -210,6 +210,7 @@ void register_m68k_insns (CPUM68KState *env);
 #ifdef CONFIG_USER_ONLY
 /* Linux uses 8k pages.  */
 #define TARGET_PAGE_BITS 13
+#define MMAP_SHIFT TARGET_PAGE_BITS
 #else
 /* Smallest TLB entry size is 1k.  */
 #define TARGET_PAGE_BITS 10