diff --git a/spec/function.dd b/spec/function.dd
index 80ef1dffd3..08e51599cd 100644
--- a/spec/function.dd
+++ b/spec/function.dd
@@ -1188,6 +1188,12 @@ int foo(in int x, out int y, ref int z, int q);
     $(TROW $(D scope), references in the parameter
     cannot be escaped (e.g. assigned to a global variable).
     Ignored for parameters with no references)
+    $(TROW $(D return), Parameter may be returned or copied to the first parameter,
+    $(TROW $(D const), argument is implicitly converted to a const type)
+    but otherwise does not escape from the function.
+    Such copies are required not to outlive the argument(s) they were derived from.
+    Ignored for parameters with no references.
+    See $(DDSUBLINK memory-safe-d, scope-params, Scope Parameters).)
     $(TROW $(D lazy), argument is evaluated by the called function and not by the caller)
         $(TROW $(D const), argument is implicitly converted to a const type)
     $(TROW $(D immutable), argument is implicitly converted to an immutable type)