diff --git a/redo/control_darwin.go b/redo/control_darwin.go
index faeb899..55e7550 100644
--- a/redo/control_darwin.go
+++ b/redo/control_darwin.go
@@ -21,7 +21,7 @@ func basesetParent(c controlPrivate, p *controlParent) {
 }
 
 func basepreferredSize(c controlPrivate, d *sizing) (int, int) {
-	s := C.controlPrefSize(c.id())
+	s := C.controlPreferredSize(c.id())
 	return int(s.width), int(s.height)
 }
 
diff --git a/redo/label_darwin.go b/redo/label_darwin.go
index ab2cbab..d42bd0a 100644
--- a/redo/label_darwin.go
+++ b/redo/label_darwin.go
@@ -63,7 +63,7 @@ func (l *label) commitResize(c *allocation, d *sizing) {
 		if d.neighborAlign.baseline != 0 {		// no adjustment needed if the given control has no baseline
 			// in order for the baseline value to be correct, the label MUST BE AT THE HEIGHT THAT OS X WANTS IT TO BE!
 			// otherwise, the baseline calculation will be relative to the bottom of the control, and everything will be wrong
-			origsize := C.controlPrefSize(l._id)
+			origsize := C.controlPreferredSize(l._id)
 			c.height = int(origsize.height)
 			newrect := C.struct_xrect{
 				x:		C.intptr_t(c.x),
diff --git a/redo/objc_darwin.h b/redo/objc_darwin.h
index 9962c4e..79d1e04 100644
--- a/redo/objc_darwin.h
+++ b/redo/objc_darwin.h
@@ -83,8 +83,8 @@ struct xalignment {
 	struct xrect rect;
 	intptr_t baseline;
 };
-extern struct xsize controlPrefSize(id);
-extern struct xsize tabPrefSize(id);
+extern struct xsize controlPreferredSize(id);
+extern struct xsize tabPreferredSize(id);
 extern struct xalignment alignmentInfo(id, struct xrect);
 extern struct xrect frame(id);
 
diff --git a/redo/tab_darwin.go b/redo/tab_darwin.go
index 25b94d0..ba74f1f 100644
--- a/redo/tab_darwin.go
+++ b/redo/tab_darwin.go
@@ -41,7 +41,7 @@ func (t *tab) allocate(x int, y int, width int, height int, d *sizing) []*alloca
 }
 
 func (t *tab) preferredSize(d *sizing) (width, height int) {
-	s := C.tabPrefSize(t._id)
+	s := C.tabPreferredSize(t._id)
 	return int(s.width), int(s.height)
 }
 
diff --git a/redo/xsizing_darwin.m b/redo/xsizing_darwin.m
index 6b37378..84d83f2 100644
--- a/redo/xsizing_darwin.m
+++ b/redo/xsizing_darwin.m
@@ -11,7 +11,7 @@
 // TODO merge into control_darwin.m or sizing_darwin.m? really need to figure out what to do about the Go-side container struct...
 
 // also good for NSTableView (TODO might not do what we want) and NSProgressIndicator
-struct xsize controlPrefSize(id control)
+struct xsize controlPreferredSize(id control)
 {
 	NSControl *c;
 	NSRect r;
@@ -25,7 +25,7 @@ struct xsize controlPrefSize(id control)
 	return s;
 }
 
-struct xsize tabPrefSize(id control)
+struct xsize tabPreferredSize(id control)
 {
 	NSTabView *tv;
 	NSSize s;