diff --git a/src/os/unix/mod.rs b/src/os/unix/mod.rs
index 0e2f492..2cfc753 100644
--- a/src/os/unix/mod.rs
+++ b/src/os/unix/mod.rs
@@ -238,7 +238,7 @@ impl Window {
 
         let check_res = buffer_helper::check_buffer_size(self.shared_data.width as usize,
                                                          self.shared_data.height as usize,
-                                                         self.scale as usize,
+                                                         self.shared_data.scale as usize,
                                                          buffer);
         if check_res.is_err() {
             return check_res;