diff --git a/src/ivfflat.h b/src/ivfflat.h
index 4b840b6..41d5239 100644
--- a/src/ivfflat.h
+++ b/src/ivfflat.h
@@ -152,9 +152,7 @@ typedef struct IvfflatLeader
 
 typedef struct IvfflatTypeInfo
 {
-	int			dimensions;
 	int			maxDimensions;
-	int			itemsize;
 	void		(*updateCenter) (Pointer v, int dimensions, float *x);
 	void		(*sumCenter) (Pointer v, float *x);
 }			IvfflatTypeInfo;