diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 3988e44f4934b198a2beb1798ef903c6ce7979de..7c5b2dd9a1a1fdd851775cb462414f1dd8bc7457 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -270,7 +270,7 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
 		tmpbyte & 1, tmpbyte & 0x30);
 
 	*try_mmio = 0;
-#ifdef CONFIG_PPC
+#ifdef CONFIG_PPC_MERGE
 	if (machine_is(cell))
 		*try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
 #endif