diff --git a/spice.proto b/spice.proto
index e1062eb..c399150 100644
--- a/spice.proto
+++ b/spice.proto
@@ -412,7 +412,7 @@ struct Clip {
     clip_type type;
     switch (type) {
     case RECTS:
-        ClipRects *data @outvar(cliprects);
+        ClipRects *rects @outvar(cliprects) @c_ptr;
     } u @anon;
 };
 
diff --git a/spice1.proto b/spice1.proto
index 98ffb49..75749af 100644
--- a/spice1.proto
+++ b/spice1.proto
@@ -382,7 +382,7 @@ struct Clip {
     clip_type type;
     switch (type) {
     case RECTS:
-        ClipRects *data @outvar(cliprects);
+        ClipRects *rects @outvar(cliprects) @c_ptr;
     default:
         uint64 data @zero;
     } u @anon;