diff --git a/core/classes/tuple/tuple-tests.factor b/core/classes/tuple/tuple-tests.factor
index 950650dbf0..db0e25f091 100755
--- a/core/classes/tuple/tuple-tests.factor
+++ b/core/classes/tuple/tuple-tests.factor
@@ -3,7 +3,7 @@ math.constants parser sequences tools.test words assocs
 namespaces quotations sequences.private classes continuations
 generic.standard effects classes.tuple classes.tuple.private
 arrays vectors strings compiler.units accessors classes.algebra
-calendar prettyprint io.streams.string splitting ;
+calendar prettyprint io.streams.string splitting inspector ;
 IN: classes.tuple.tests
 
 TUPLE: rect x y w h ;
@@ -418,6 +418,48 @@ test-a/b
 
 test-a/b
 
+! Moving slots up and down
+TUPLE: move-up-1 a b ;
+TUPLE: move-up-2 < move-up-1 c ;
+
+T{ move-up-2 f "a" "b" "c" } "move-up" set
+
+: test-move-up
+    [ "a" ] [ "move-up" get a>> ] unit-test
+    [ "b" ] [ "move-up" get b>> ] unit-test
+    [ "c" ] [ "move-up" get c>> ] unit-test ;
+
+test-move-up
+
+[ ] [ "IN: classes.tuple.tests TUPLE: move-up-1 a b c ; TUPLE: move-up-2 < move-up-1 ;" eval ] unit-test
+
+test-move-up
+
+[ ] [ "IN: classes.tuple.tests TUPLE: move-up-1 a c ; TUPLE: move-up-2 < move-up-1 b ;" eval ] unit-test
+
+test-move-up
+
+[ ] [ "IN: classes.tuple.tests TUPLE: move-up-1 c ; TUPLE: move-up-2 < move-up-1 b a ;" eval ] unit-test
+
+test-move-up
+
+[ ] [ "IN: classes.tuple.tests TUPLE: move-up-1 ; TUPLE: move-up-2 < move-up-1 a b c ;" eval ] unit-test
+
+! Constructors must be recompiled when changing superclass
+TUPLE: constructor-update-1 xxx ;
+
+TUPLE: constructor-update-2 < constructor-update-1 yyy zzz ;
+
+C: <constructor-update-2> constructor-update-2
+
+{ 3 1 } [ <constructor-update-2> ] must-infer-as
+
+[ ] [ "IN: classes.tuple.tests TUPLE: constructor-update-1 xxx ttt www ;" eval ] unit-test
+
+{ 5 1 } [ <constructor-update-2> ] must-infer-as
+
+[ { f 1 2 3 4 5 } ] [ 1 2 3 4 5 <constructor-update-2> tuple-slots ] unit-test
+
 ! Redefinition problem
 TUPLE: redefinition-problem ;
 
diff --git a/core/classes/tuple/tuple.factor b/core/classes/tuple/tuple.factor
index 158ea9fc55..a3d0238d1c 100755
--- a/core/classes/tuple/tuple.factor
+++ b/core/classes/tuple/tuple.factor
@@ -184,15 +184,14 @@ PRIVATE>
 : redefine-tuple-class ( class superclass slots -- )
     [
         2drop
-        [ update-tuples-after ] each-subclass
-    ]
-    [
-        nip
-        [ forget-removed-slots ]
-        [ drop changed-word ]
-        [ drop redefined ]
-        2tri
+        [
+            [ update-tuples-after ]
+            [ changed-word ]
+            [ redefined ]
+            tri
+        ] each-subclass
     ]
+    [ nip forget-removed-slots ]
     [ define-new-tuple-class ]
     3tri ;