diff --git a/include/malunal/types/error.h b/include/malunal/types/error.h
index 8c3491b..8aa6a81 100644
--- a/include/malunal/types/error.h
+++ b/include/malunal/types/error.h
@@ -77,7 +77,7 @@ typedef struct {
    *          changed. When null, it means that there is no error regardless of
    *          what code is present.
    */
-  error_domain_iptr_t const domain;
+  error_domain_iptr_t domain;
 
   /**
    * @brief   The code of the error within its domain.