diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h
index 49ebf79..5b70f4c 100644
--- a/arch/nios2/include/asm/dma-mapping.h
+++ b/arch/nios2/include/asm/dma-mapping.h
@@ -15,7 +15,7 @@
 	void *addr = malloc(len + DCACHE_LINE_SIZE);
 	if (!addr)
 		return 0;
-	flush_dcache_range((unsigned long)addr, len + DCACHE_LINE_SIZE);
+	flush_dcache_range((unsigned long)addr,(unsigned long)addr + len + DCACHE_LINE_SIZE);
 	*handle = ((unsigned long)addr +
 		   (DCACHE_LINE_SIZE - 1)) &
 		~(DCACHE_LINE_SIZE - 1) & ~(IO_REGION_BASE);