diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 54540c369c9087fa9d2e7d7dc1b2df0783f7d2b7..be6fa105cd34214d11c8b5bbf11dbc305f7ddae3 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -31,7 +31,6 @@
 #endif
 
 #define DEBUG_NODIRECT 0
-#define DEBUG_FORCEDAC 0
 
 #define ISA_DMA_MASK		0x00ffffff