diff --git a/dlls/d3d10/d3d10_private.h b/dlls/d3d10/d3d10_private.h
index 01068e0ffeb..51696ef268c 100644
--- a/dlls/d3d10/d3d10_private.h
+++ b/dlls/d3d10/d3d10_private.h
@@ -69,7 +69,6 @@ struct d3d10_effect_object
 {
     struct d3d10_effect_pass *pass;
     enum d3d10_effect_object_type type;
-    DWORD idx_offset;
     DWORD index;
     void *data;
 };