diff --git a/Source/NSWindow.m b/Source/NSWindow.m
index c80b171bf..3e9c93e66 100644
--- a/Source/NSWindow.m
+++ b/Source/NSWindow.m
@@ -2109,10 +2109,7 @@ - (NSPoint) cascadeTopLeftFromPoint: (NSPoint)topLeftPoint
 
 - (BOOL) showsResizeIndicator
 {
-  // TODO
-  NSLog(@"Method %s is not implemented for class %s",
-        "showsResizeIndicator", "NSWindow");
-  return YES;
+  return ([self styleMask] & NSResizableWindowMask) ? YES : NO;
 }
 
 - (void) setShowsResizeIndicator: (BOOL)show