diff --git a/bleh_darwin.m b/bleh_darwin.m
index 699f177..5a2cbcf 100644
--- a/bleh_darwin.m
+++ b/bleh_darwin.m
@@ -29,6 +29,20 @@ These are the objc_msgSend() wrappers around NSRect. The problem is that while o
 I use int64_t for maximum safety, as my coordinates are stored as Go ints and Go int -> C int (which is what is documented as happening) isn't reliable.
 */
 
+struct xrect objc_msgSend_stret_rect_noargs(id obj, SEL sel)
+{
+	NSRect s;
+	struct xrect t;
+
+	objc_msgSend_stret(&s, obj, sel);
+	t.x = (int64_t) s.origin.x;
+	t.y = (int64_t) s.origin.y;
+	t.width = (int64_t) s.size.width;
+	t.height = (int64_t) s.size.height;
+	return t;
+}
+
+
 #define OurRect() (NSMakeRect((CGFloat) x, (CGFloat) y, (CGFloat) w, (CGFloat) h))
 
 id _objc_msgSend_rect(id obj, SEL sel, int64_t x, int64_t y, int64_t w, int64_t h)
diff --git a/objc_darwin.h b/objc_darwin.h
index e73687e..173f238 100644
--- a/objc_darwin.h
+++ b/objc_darwin.h
@@ -21,6 +21,15 @@ inline id objc_msgSend_noargs(id obj, SEL sel)
 	return objc_msgSend(obj, sel);
 }
 
+struct xrect {
+	int64_t x;
+	int64_t y;
+	int64_t width;
+	int64_t height;
+};
+
+extern struct xrect objc_msgSend_stret_rect_noargs(id obj, SEL sel);
+
 struct xsize {
 	int64_t width;
 	int64_t height;
diff --git a/sysdata_darwin.go b/sysdata_darwin.go
index 3456580..c50eeed 100644
--- a/sysdata_darwin.go
+++ b/sysdata_darwin.go
@@ -38,6 +38,7 @@ var (
 	_title = sel_getUid("title")
 	_stringValue = sel_getUid("stringValue")
 	// TODO others
+	_frame = sel_getUid("_frame")
 	_setFrameDisplay = sel_getUid("setFrame:display:")
 )
 
@@ -219,8 +220,9 @@ func (s *sysData) setWindowSize(width int, height int) error {
 	defer close(ret)
 	uitask <- func() {
 		// we need to get the top left point
+		r := C.objc_msgSend_stret_rect_noargs(s.id, _frame)
 		objc_msgSend_rect_bool(s.id, _setFrameDisplay,
-			x, y, width, height,
+			int(r.x), int(r.y), width, height,
 			C.BOOL(C.YES))		// TODO set to NO to prevent subviews from being redrawn before they are resized?
 		ret <- struct{}{}
 	}