diff --git a/cocoa/src/appkit.rs b/cocoa/src/appkit.rs
index d9fd16c..6d00d52 100644
--- a/cocoa/src/appkit.rs
+++ b/cocoa/src/appkit.rs
@@ -1813,6 +1813,7 @@ pub trait NSPanel: Sized {
     unsafe fn becomesKeyOnlyIfNeeded(self) -> BOOL;
     unsafe fn setFloatingPanel(self, floatingPanel: BOOL);
     unsafe fn floatingPanel(self) -> BOOL;
+    unsafe fn setWorksWhenModal(self, worksWithPanel: BOOL);
 }
 
 impl NSPanel for id {
@@ -1833,6 +1834,10 @@ impl NSPanel for id {
     unsafe fn floatingPanel(self) -> BOOL {
         msg_send![self, isFloatingPanel]
     }
+
+    unsafe fn setWorksWhenModal(self, worksWhenModal: BOOL) {
+        msg_send![self, setWorksWhenModal: worksWhenModal]
+    }
 }
 
 #[repr(i64)]