diff --git a/dojo.h b/dojo.h
index b38b227..dea7dbd 100644
--- a/dojo.h
+++ b/dojo.h
@@ -29,7 +29,7 @@ typedef struct CJsonRpcClient CJsonRpcClient;
 typedef struct ToriiClient ToriiClient;
 
 typedef struct Error {
-  const char *message;
+  char *message;
 } Error;
 
 typedef enum Result_____ToriiClient_Tag {
diff --git a/src/lib.rs b/src/lib.rs
index 5da90ff..2e7bb8e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -490,7 +490,7 @@ pub unsafe extern "C" fn entity_free(entity: *mut Entity) {
 #[allow(clippy::missing_safety_doc)]
 pub unsafe extern "C" fn error_free(error: *mut Error) {
     if !error.is_null() {
-        let _: String = CString::from_raw((*error).message as *mut i8)
+        let _: String = CString::from_raw((*error).message)
             .into_string()
             .unwrap();
     }
diff --git a/src/types.rs b/src/types.rs
index 1732163..b9ff9f5 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -171,7 +171,7 @@ pub struct CHashItem<K, V> {
 #[derive(Debug, Clone)]
 #[repr(C)]
 pub struct Error {
-    pub message: *const c_char,
+    pub message: *mut c_char,
 }
 
 #[derive(Clone, Debug)]