diff --git a/src/wasmtime.rs b/src/wasmtime.rs
index d9ded12565..2dbae33cb5 100644
--- a/src/wasmtime.rs
+++ b/src/wasmtime.rs
@@ -55,7 +55,7 @@ use std::process::exit;
 use wasmtime_execute::{ActionOutcome, InstancePlus, JITCode, Namespace};
 use wasmtime_wast::instantiate_spectest;
 
-static LOG_FILENAME_PREFIX: &str = "cranelift.dbg.";
+static LOG_FILENAME_PREFIX: &str = "wasmtime.dbg.";
 
 const USAGE: &str = "
 Wasm runner.