diff --git a/src/device.rs b/src/device.rs
index 38d5f1f..45d5832 100644
--- a/src/device.rs
+++ b/src/device.rs
@@ -90,10 +90,10 @@ impl SignalAverage {
 
 #[derive(Debug, Component, Deref)]
 #[component(immutable)]
-pub struct SignalPeaks(Vec<u16>);
+pub struct SignalPeaks(Vec<(usize, u16)>);
 
 impl SignalPeaks {
-    pub fn new(value: Vec<u16>) -> Self {
+    pub fn new(value: Vec<(usize, u16)>) -> Self {
         Self(value)
     }
 }
diff --git a/striker-proto/src/lib.rs b/striker-proto/src/lib.rs
index 8f92068..b3e5e33 100644
--- a/striker-proto/src/lib.rs
+++ b/striker-proto/src/lib.rs
@@ -49,7 +49,7 @@ pub enum Update {
     },
     Strike {
         timestamp: i64,
-        peaks: Vec<u16>,
+        peaks: Vec<(usize, u16)>,
         samples: Vec<i16>,
         average: u16,
     },