diff --git a/include/asm-x86/amd_iommu_types.h b/include/asm-x86/amd_iommu_types.h
index 14aaffe..2e8601b 100644
--- a/include/asm-x86/amd_iommu_types.h
+++ b/include/asm-x86/amd_iommu_types.h
@@ -27,7 +27,7 @@
 /*
  * some size calculation constants
  */
-#define DEV_TABLE_ENTRY_SIZE		256
+#define DEV_TABLE_ENTRY_SIZE		32
 #define ALIAS_TABLE_ENTRY_SIZE		2
 #define RLOOKUP_TABLE_ENTRY_SIZE	(sizeof(void *))