diff --git a/brightness/src/main.rs b/brightness/src/main.rs
index 7e7cc99..5ecb983 100644
--- a/brightness/src/main.rs
+++ b/brightness/src/main.rs
@@ -33,6 +33,8 @@ fn main() {
             osd.update();
         }
 
+        last_b = b;
+
         std::thread::sleep(std::time::Duration::from_secs(refresh_interval))
     }
 }