diff --git a/examples/rmt_onewire_temperature.rs b/examples/rmt_onewire_temperature.rs
index e0e9ebad6..3f2674257 100644
--- a/examples/rmt_onewire_temperature.rs
+++ b/examples/rmt_onewire_temperature.rs
@@ -161,7 +161,7 @@ fn ds18b20_get_temperature<'a>(addr: &OWAddress, bus: &OWDriver) -> Result<f32,
 
     ds18b20_send_command(addr, bus, Ds18b20Command::ReadScratch as u8)?;
 
-    let mut buf = [0u8; 10];
+    let mut buf = [0u8; 9];
     bus.read(&mut buf)?;
     let lsb = buf[0];
     let msb = buf[1];