diff --git a/sdk/xtdk/i686/mmtypes.h b/sdk/xtdk/i686/mmtypes.h
index b7621ab..a57b6b3 100644
--- a/sdk/xtdk/i686/mmtypes.h
+++ b/sdk/xtdk/i686/mmtypes.h
@@ -27,7 +27,6 @@
 #define MM_PTE_SHIFT                               2
 #define MM_PTI_SHIFT                               12
 #define MM_PDI_SHIFT                               22
-#define MM_PPI_SHIFT                               0
 #define MM_PTE_PAE_SHIFT                           3
 #define MM_PDI_PAE_SHIFT                           21
 #define MM_PPI_PAE_SHIFT                           30