diff --git a/drivers/base/dmapool.c b/drivers/base/dmapool.c
index fbae867..5beddc3 100644
--- a/drivers/base/dmapool.c
+++ b/drivers/base/dmapool.c
@@ -366,7 +366,7 @@
 	unsigned long		flags;
 	int			map, block;
 
-	if ((page = pool_find_page (pool, dma)) == 0) {
+	if ((page = pool_find_page(pool, dma)) == NULL) {
 		if (pool->dev)
 			dev_err(pool->dev, "dma_pool_free %s, %p/%lx (bad dma)\n",
 				pool->name, vaddr, (unsigned long) dma);