diff --git a/src/api/cocoa/mod.rs b/src/api/cocoa/mod.rs
index 0c8a8146..259f847f 100644
--- a/src/api/cocoa/mod.rs
+++ b/src/api/cocoa/mod.rs
@@ -396,7 +396,8 @@ impl Window {
             };
 
             let masks = if screen.is_some() || !builder.decorations {
-                NSBorderlessWindowMask as NSUInteger
+                NSBorderlessWindowMask as NSUInteger |
+                NSResizableWindowMask as NSUInteger
             } else {
                 NSTitledWindowMask as NSUInteger |
                 NSClosableWindowMask as NSUInteger |