diff --git a/src/OT/Layout/GPOS/SinglePosFormat1.hh b/src/OT/Layout/GPOS/SinglePosFormat1.hh
index 8b7840ed0..2ae692831 100644
--- a/src/OT/Layout/GPOS/SinglePosFormat1.hh
+++ b/src/OT/Layout/GPOS/SinglePosFormat1.hh
@@ -105,8 +105,8 @@ struct SinglePosFormat1
     const hb_map_t &glyph_map = *c->plan->glyph_map;
 
     auto it =
-    + hb_iter (this+coverage)
-    | hb_filter (glyphset)
+    + hb_iter (glyphset)
+    | hb_filter (this+coverage)
     | hb_map_retains_sorting (glyph_map)
     | hb_zip (hb_repeat (values.as_array (valueFormat.get_len ())))
     ;