diff --git a/src/builtins/any-list.pir b/src/builtins/any-list.pir
index 14711f8782f..430c391cd37 100644
--- a/src/builtins/any-list.pir
+++ b/src/builtins/any-list.pir
@@ -55,30 +55,6 @@ the size of that file down and to emphasize their generic,
     .return ($I0)
 .end
 
-=item join
-
-=cut
-
-.namespace []
-.sub 'join' :multi('String')
-    .param string sep
-    .param pmc values          :slurpy
-    .tailcall values.'join'(sep)
-.end
-
-.namespace ['Any']
-.sub 'join' :method :multi(_)
-    .param string sep          :optional
-    .param int has_sep         :opt_flag
-    if has_sep goto have_sep
-    sep = ''
-  have_sep:
-    $P0 = self.'list'()
-    $P0.'!flatten'()
-    $S0 = join sep, $P0
-    .return ($S0)
-.end
-
 =item keys()
 
 Return a List with the keys of the invocant.
diff --git a/src/setting/Any-list.pm b/src/setting/Any-list.pm
index 352a17c4783..942b5e0486d 100644
--- a/src/setting/Any-list.pm
+++ b/src/setting/Any-list.pm
@@ -11,6 +11,10 @@ class Any is also {
         }
     }
 
+    our Str multi method join(Str $separator = '') {
+        @.list.reduce({ $^a ~ $separator ~ $^b })
+    }
+
     our List multi method map(*&expr) {
         return gather {
             my $arity = &expr.arity || 1;
@@ -97,6 +101,11 @@ our List multi grep(Code $test, *@values) {
     @values.grep($test)
 }
 
+our Str multi join(Str $separator = '', *@values) {
+    die("Not enough arguments for join") if ! @values;
+    @values.join($separator)
+}
+
 our List multi map(Code $expr, *@values) {
     @values.map($expr)
 }