diff --git a/lib/c-api/src/deprecated/import/wasi.rs b/lib/c-api/src/deprecated/import/wasi.rs
index aa94f523d..6549053d5 100644
--- a/lib/c-api/src/deprecated/import/wasi.rs
+++ b/lib/c-api/src/deprecated/import/wasi.rs
@@ -212,7 +212,7 @@ pub unsafe extern "C" fn wasmer_wasi_generate_default_import_object() -> *mut wa
     let store = get_global_store();
     let mut wasi_state_builder = wasi::WasiState::new("wasmer-wasi-default-program-name");
     let wasi_state = wasi_state_builder.build().unwrap();
-    let mut wasi_env = wasi::WasiEnv::new(wasi_state);
+    let wasi_env = wasi::WasiEnv::new(wasi_state);
     let import_object_inner: Box<dyn NamedResolver> = Box::new(
         wasi::generate_import_object_from_env(store, wasi_env, wasi::WasiVersion::Latest),
     );
diff --git a/lib/c-api/src/wasm_c_api/wasi/mod.rs b/lib/c-api/src/wasm_c_api/wasi/mod.rs
index 1a109bd8e..1ef66b356 100644
--- a/lib/c-api/src/wasm_c_api/wasi/mod.rs
+++ b/lib/c-api/src/wasm_c_api/wasi/mod.rs
@@ -208,7 +208,7 @@ pub unsafe extern "C" fn wasi_env_read_stdout(
     buffer_len: usize,
 ) -> isize {
     let inner_buffer = slice::from_raw_parts_mut(buffer as *mut _, buffer_len as usize);
-    let mut state = env.inner.state_mut();
+    let mut state = env.inner.state();
 
     let stdout = if let Ok(stdout) = state.fs.stdout_mut() {
         if let Some(stdout) = stdout.as_mut() {
@@ -232,7 +232,7 @@ pub unsafe extern "C" fn wasi_env_read_stderr(
     buffer_len: usize,
 ) -> isize {
     let inner_buffer = slice::from_raw_parts_mut(buffer as *mut _, buffer_len as usize);
-    let mut state = env.inner.state_mut();
+    let mut state = env.inner.state();
     let stderr = if let Ok(stderr) = state.fs.stderr_mut() {
         if let Some(stderr) = stderr.as_mut() {
             stderr