diff --git a/lib/middleware-common-tests/src/lib.rs b/lib/middleware-common-tests/src/lib.rs
index d3beeb8f7..20d69bb3d 100644
--- a/lib/middleware-common-tests/src/lib.rs
+++ b/lib/middleware-common-tests/src/lib.rs
@@ -110,7 +110,7 @@ mod tests {
                 baseline: true,
                 msm: msm,
                 base: instance.module.runnable_module.get_code().unwrap().as_ptr() as usize,
-                backend: MCG::backend_id().to_string(),
+                backend: MCG::backend_id(),
                 runnable_module: instance.module.runnable_module.clone(),
             });
             true
@@ -152,7 +152,7 @@ mod tests {
                 baseline: true,
                 msm: msm,
                 base: instance.module.runnable_module.get_code().unwrap().as_ptr() as usize,
-                backend: MCG::backend_id().to_string(),
+                backend: MCG::backend_id(),
                 runnable_module: instance.module.runnable_module.clone(),
             });
             true
diff --git a/lib/runtime-core/src/state.rs b/lib/runtime-core/src/state.rs
index 870e955a5..f7e9cc791 100644
--- a/lib/runtime-core/src/state.rs
+++ b/lib/runtime-core/src/state.rs
@@ -186,7 +186,7 @@ pub struct CodeVersion {
     pub base: usize,
 
     /// The backend used to compile this module.
-    pub backend: String,
+    pub backend: &'static str,
 
     /// `RunnableModule` for this code version.
     pub runnable_module: Arc<Box<dyn RunnableModule>>,
diff --git a/src/bin/wasmer.rs b/src/bin/wasmer.rs
index 339b0a1bb..7c4c04161 100644
--- a/src/bin/wasmer.rs
+++ b/src/bin/wasmer.rs
@@ -486,7 +486,7 @@ fn execute_wasi(
                 baseline: true,
                 msm: msm,
                 base: instance.module.runnable_module.get_code().unwrap().as_ptr() as usize,
-                backend: options.backend.to_string().to_owned(),
+                backend: options.backend.to_string(),
                 runnable_module: instance.module.runnable_module.clone(),
             });
             true