diff --git a/src/hb-algs.hh b/src/hb-algs.hh
index eeac4b95693ea366bbf07623e2a65fae4278cbac..fe41702cfe24c9ff4f6ac8cb6eac86c2ced2dc54 100644
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -193,13 +193,13 @@ HB_FUNCOBJ (hb_second);
 struct
 {
   template <typename T, typename T2> auto
-  operator () (const T& a, const T2& b) const HB_AUTO_RETURN (a <= b ? a : b)
+  operator () (T&& a, T2&& b) const HB_AUTO_RETURN (a <= b ? a : b)
 }
 HB_FUNCOBJ (hb_min);
 struct
 {
   template <typename T, typename T2> auto
-  operator () (const T& a, const T2& b) const HB_AUTO_RETURN (a >= b ? a : b)
+  operator () (T&& a, T2&& b) const HB_AUTO_RETURN (a >= b ? a : b)
 }
 HB_FUNCOBJ (hb_max);