diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c
index 166aee1..1f9f94f 100644
--- a/arch/arm/mm/consistent.c
+++ b/arch/arm/mm/consistent.c
@@ -485,7 +485,7 @@
 {
 	const void *end = start + size;
 
-	BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end));
+	BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end - 1));
 
 	switch (direction) {
 	case DMA_FROM_DEVICE:		/* invalidate only */