diff --git a/darwin/box.m b/darwin/box.m
index 5ef801a0..be4658a4 100644
--- a/darwin/box.m
+++ b/darwin/box.m
@@ -168,7 +168,7 @@ static void relayout(uiBox *b)
 
 	// if there is a stretchy control, add the no-stretchy view
 	addRemoveNoStretchyView(b, hasStretchy);
-	if (hasStretchy) {
+	if (!hasStretchy) {
 		[b->view addConstraint:mkConstraint(b->noStretchyView, b->primaryStart,
 			NSLayoutRelationEqual,
 			prev, b->primaryEnd,
diff --git a/darwin/spinbox.m b/darwin/spinbox.m
index d2be6d89..1ddff150 100644
--- a/darwin/spinbox.m
+++ b/darwin/spinbox.m
@@ -89,7 +89,7 @@ struct uiSpinbox {
 			self, NSLayoutAttributeBottom,
 			1, 0,
 			@"uiSpinbox bottom edge stepper")];
-		[self addConstraint:mkConstraint(self->stepper, NSLayoutAttributeTrailing,
+		[self addConstraint:mkConstraint(self->tf, NSLayoutAttributeTrailing,
 			NSLayoutRelationEqual,
 			self->stepper, NSLayoutAttributeLeading,
 			1, -3,		// TODO