diff --git a/include/asm-frv/cacheflush.h b/include/asm-frv/cacheflush.h
index eaa5826..0250040 100644
--- a/include/asm-frv/cacheflush.h
+++ b/include/asm-frv/cacheflush.h
@@ -20,6 +20,7 @@
  */
 #define flush_cache_all()			do {} while(0)
 #define flush_cache_mm(mm)			do {} while(0)
+#define flush_cache_dup_mm(mm)			do {} while(0)
 #define flush_cache_range(mm, start, end)	do {} while(0)
 #define flush_cache_page(vma, vmaddr, pfn)	do {} while(0)
 #define flush_cache_vmap(start, end)		do {} while(0)