diff --git a/plugins/examples/gain-gui/src/lib.rs b/plugins/examples/gain-gui/src/lib.rs
index 8ce09513..037091fe 100644
--- a/plugins/examples/gain-gui/src/lib.rs
+++ b/plugins/examples/gain-gui/src/lib.rs
@@ -178,7 +178,7 @@ impl Plugin for Gain {
                 amplitude += *sample;
             }
 
-            amplitude /= num_samples as f32;
+            amplitude = (amplitude / num_samples as f32).abs();
             let current_peak_meter = self.peak_meter.load(std::sync::atomic::Ordering::Relaxed);
             let new_peak_meter = if amplitude > current_peak_meter {
                 amplitude