diff --git a/Frameworks/DocumentWindow/src/DocumentController.mm b/Frameworks/DocumentWindow/src/DocumentController.mm
index 2403f9a2..198d1830 100644
--- a/Frameworks/DocumentWindow/src/DocumentController.mm
+++ b/Frameworks/DocumentWindow/src/DocumentController.mm
@@ -492,8 +492,6 @@ OAK_DEBUG_VAR(DocumentController);
 	tabBarView.dataSource = self;
 	[tabBarView reloadData]; // FIXME this should be implicit
 
-	[self.window setPrivateBottomCornerRounded:NO];
-
 	// Move up the tab bar view in the responder chain so that it is next responder for its siblings. This is so that performClose: goes through the tab bar view, at least when one of the view’s siblings is first responder
 	NSResponder* contentView = [tabBarView nextResponder];
 	[tabBarView setNextResponder:[contentView nextResponder]];
diff --git a/Frameworks/OakAppKit/src/NSWindow Additions.h b/Frameworks/OakAppKit/src/NSWindow Additions.h
index e2c8b9b9..a2b0f510 100644
--- a/Frameworks/OakAppKit/src/NSWindow Additions.h	
+++ b/Frameworks/OakAppKit/src/NSWindow Additions.h	
@@ -1,4 +1,3 @@
 @interface NSWindow (Other)
 - (void)toggleVisibility;
-- (void)setPrivateBottomCornerRounded:(BOOL)flag;
 @end
diff --git a/Frameworks/OakAppKit/src/NSWindow Additions.mm b/Frameworks/OakAppKit/src/NSWindow Additions.mm
index ce3bc970..c010ba4c 100644
--- a/Frameworks/OakAppKit/src/NSWindow Additions.mm	
+++ b/Frameworks/OakAppKit/src/NSWindow Additions.mm	
@@ -1,9 +1,5 @@
 #import "NSWindow Additions.h"
 
-@interface NSWindow (Private)
-- (void)setBottomCornerRounded:(BOOL)flag;
-@end
-
 @implementation NSWindow (Other)
 - (void)toggleVisibility
 {
@@ -19,10 +15,4 @@
 		[self makeKeyAndOrderFront:self];
 	}
 }
-
-- (void)setPrivateBottomCornerRounded:(BOOL)flag
-{
-	if([self respondsToSelector:@selector(setBottomCornerRounded:)])
-		[self setBottomCornerRounded:flag];
-}
 @end