1 files changed, 2 insertions, 2 deletions
diff --git a/src/win32/mod.rs b/src/win32/mod.rs
index 2e0dcae..f900c1f 100644
--- a/src/win32/mod.rs
+++ b/src/win32/mod.rs
@@ -47,7 +47,7 @@ impl HeadlessContext {
         ::Api::OpenGl
     }
 
-    pub fn set_window_resize_callback(&mut self, _: fn(uint, uint)) {
+    pub fn set_window_resize_callback(&mut self, _: Option<fn(uint, uint)>) {
     }
 }
 
@@ -280,7 +280,7 @@ impl Window {
         ::Api::OpenGl
     }
 
-    pub fn set_window_resize_callback(&mut self, _: fn(uint, uint)) {
+    pub fn set_window_resize_callback(&mut self, _: Option<fn(uint, uint)>) {
     }
 }