diff --git a/src/hb-ot-color-colr-table.hh b/src/hb-ot-color-colr-table.hh
index 82eab9633..92a49bb4f 100644
--- a/src/hb-ot-color-colr-table.hh
+++ b/src/hb-ot-color-colr-table.hh
@@ -174,7 +174,7 @@ struct COLR
     baseGlyphsZ = COLR::min_size;
     layersZ = COLR::min_size + numBaseGlyphs * BaseGlyphRecord::min_size;
 
-    for (const hb_item_type<BaseIterator>& _ : + base_it.iter ())
+    for (const hb_item_type<BaseIterator> _ : + base_it.iter ())
     {
       auto* record = c->embed (_);
       if (unlikely (!record)) return_trace (false);
diff --git a/src/hb-ot-layout-common.hh b/src/hb-ot-layout-common.hh
index 30571fb80..6ca69085f 100644
--- a/src/hb-ot-layout-common.hh
+++ b/src/hb-ot-layout-common.hh
@@ -1717,7 +1717,7 @@ struct ClassDefFormat1
 
     startGlyph = glyph_min;
     if (unlikely (!classValue.serialize (c, glyph_count))) return_trace (false);
-    for (const hb_pair_t<hb_codepoint_t, unsigned>& gid_klass_pair : + it)
+    for (const hb_pair_t<hb_codepoint_t, unsigned> gid_klass_pair : + it)
     {
       unsigned idx = gid_klass_pair.first - glyph_min;
       classValue[idx] = gid_klass_pair.second;