diff --git a/arch/ia64/kernel/pci-dma.c b/arch/ia64/kernel/pci-dma.c
index 031abbf9c875f01a1276c88a94b08612c497ce2d..dbdb778efa055f3a94298105d9eeeba3b9d086a1 100644
--- a/arch/ia64/kernel/pci-dma.c
+++ b/arch/ia64/kernel/pci-dma.c
@@ -12,13 +12,11 @@
 #include <asm/machvec.h>
 #include <linux/dma-mapping.h>
 
-#include <asm/machvec.h>
 #include <asm/system.h>
 
 #ifdef CONFIG_DMAR
 
 #include <linux/kernel.h>
-#include <linux/string.h>
 
 #include <asm/page.h>
 #include <asm/iommu.h>