diff --git a/utils/src/lib.rs b/utils/src/lib.rs
index d0b0179..c18295b 100644
--- a/utils/src/lib.rs
+++ b/utils/src/lib.rs
@@ -72,6 +72,9 @@
         let mut reply : [u32;1] = [0];
         matcha_hal::mailbox::MAILBOX.recv_message_sync(&mut reply);
 
-        dprintf!("ACK = 0x{:08X} received, SMC is starting.\n", reply[0]);
+        dprintf!("ACK = 0x{:08X} received.\n", reply[0]);
+
+        // This message is checked in shodan_boot.robot - keep in sync.
+        dprintf!("load_sel4() completed successfully\n");
     }
 }