diff --git a/redo/osxaltest/box.m b/redo/osxaltest/box.m
index 773ae371..ab56fd55 100644
--- a/redo/osxaltest/box.m
+++ b/redo/osxaltest/box.m
@@ -67,12 +67,21 @@
 	pp.extraVert = p->extraVert;
 	pp.views = p->views;
 	pp.n = p->n;
+	pp.stretchyVert = self->vertical;
+	pp.firstStretchy = TRUE;
 	for (i = 0; i < [self->children count]; i++) {
 		id<tControl> cur;
+		NSNumber *stretchy;
 
 		first[i] = pp.n;
 		cur = (id<tControl>) [self->children objectAtIndex:i];
+		stretchy = (NSNumber *) [self->stretchy objectAtIndex:i];
+		pp.stretchy = [stretchy boolValue];
 		[cur tFillAutoLayout:&pp];
+		if (pp.stretchy && pp.firstStretchy) {
+			pp.firstStretchy = FALSE;
+			pp.stretchyTo = first[i];
+		}
 	}
 	p->n = pp.n;
 
diff --git a/redo/osxaltest/osxaltest.h b/redo/osxaltest/osxaltest.h
index 8f14143e..1c01d796 100644
--- a/redo/osxaltest/osxaltest.h
+++ b/redo/osxaltest/osxaltest.h
@@ -11,6 +11,10 @@ struct tAutoLayoutParams {
 	NSMutableArray *extraVert;
 	NSMutableDictionary *views;
 	uintmax_t n;
+	BOOL stretchy;
+	BOOL stretchyVert;
+	BOOL firstStretchy;
+	uintmax_t stretchyTo;
 };
 
 @protocol tControl