diff --git a/src/entt/container/dense_map.hpp b/src/entt/container/dense_map.hpp
index 31751e0a2..3901977cd 100644
--- a/src/entt/container/dense_map.hpp
+++ b/src/entt/container/dense_map.hpp
@@ -341,6 +341,8 @@ class dense_map {
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Key type of the container. */
     using key_type = Key;
     /*! @brief Mapped type of the container. */
@@ -353,8 +355,6 @@ public:
     using hasher = Hash;
     /*! @brief Type of function to use to compare the keys for equality. */
     using key_equal = KeyEqual;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Input iterator type. */
     using iterator = internal::dense_map_iterator<typename packed_container_type::iterator>;
     /*! @brief Constant input iterator type. */
diff --git a/src/entt/container/dense_set.hpp b/src/entt/container/dense_set.hpp
index ca95ab97a..8073e02d8 100644
--- a/src/entt/container/dense_set.hpp
+++ b/src/entt/container/dense_set.hpp
@@ -287,6 +287,8 @@ class dense_set {
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Key type of the container. */
     using key_type = Type;
     /*! @brief Value type of the container. */
@@ -297,8 +299,6 @@ public:
     using hasher = Hash;
     /*! @brief Type of function to use to compare the elements for equality. */
     using key_equal = KeyEqual;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Random access iterator type. */
     using iterator = internal::dense_set_iterator<typename packed_container_type::iterator>;
     /*! @brief Constant random access iterator type. */
diff --git a/src/entt/entity/observer.hpp b/src/entt/entity/observer.hpp
index f15c233b9..1afc2059e 100644
--- a/src/entt/entity/observer.hpp
+++ b/src/entt/entity/observer.hpp
@@ -262,14 +262,14 @@ class basic_observer: private basic_storage<Mask, typename Registry::entity_type
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! Basic registry type. */
     using registry_type = Registry;
     /*! @brief Underlying entity identifier. */
     using entity_type = typename registry_type::entity_type;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Random access iterator type. */
     using iterator = typename registry_type::common_type::iterator;
 
diff --git a/src/entt/entity/sparse_set.hpp b/src/entt/entity/sparse_set.hpp
index 17131fe37..b042f93d4 100644
--- a/src/entt/entity/sparse_set.hpp
+++ b/src/entt/entity/sparse_set.hpp
@@ -370,14 +370,14 @@ protected:
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Underlying entity identifier. */
     using entity_type = typename traits_type::value_type;
     /*! @brief Underlying version type. */
     using version_type = typename traits_type::version_type;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Pointer type to contained entities. */
     using pointer = typename packed_container_type::const_pointer;
     /*! @brief Random access iterator type. */
diff --git a/src/entt/entity/storage.hpp b/src/entt/entity/storage.hpp
index a78d5aea3..28a1fea81 100644
--- a/src/entt/entity/storage.hpp
+++ b/src/entt/entity/storage.hpp
@@ -391,6 +391,8 @@ protected:
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Base type. */
     using base_type = underlying_type;
     /*! @brief Element type. */
@@ -401,8 +403,6 @@ public:
     using entity_type = Entity;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Pointer type to contained elements. */
     using pointer = typename container_type::pointer;
     /*! @brief Constant pointer type to contained elements. */
@@ -779,6 +779,8 @@ class basic_storage<Type, Entity, Allocator, std::enable_if_t<component_traits<T
     using traits_type = component_traits<Type>;
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Base type. */
     using base_type = basic_sparse_set<Entity, typename alloc_traits::template rebind_alloc<Entity>>;
     /*! @brief Element type. */
@@ -789,8 +791,6 @@ public:
     using entity_type = Entity;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Extended iterable storage proxy. */
     using iterable = iterable_adaptor<internal::extended_storage_iterator<typename base_type::iterator>>;
     /*! @brief Constant extended iterable storage proxy. */
@@ -983,6 +983,8 @@ protected:
     }
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Base type. */
     using base_type = basic_sparse_set<Entity, Allocator>;
     /*! @brief Element type. */
@@ -991,8 +993,6 @@ public:
     using entity_type = Entity;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Extended iterable storage proxy. */
     using iterable = iterable_adaptor<internal::extended_storage_iterator<typename base_type::iterator>>;
     /*! @brief Constant extended iterable storage proxy. */
diff --git a/src/entt/resource/cache.hpp b/src/entt/resource/cache.hpp
index 590f73d1b..887846905 100644
--- a/src/entt/resource/cache.hpp
+++ b/src/entt/resource/cache.hpp
@@ -157,14 +157,14 @@ class resource_cache {
     using container_type = dense_map<id_type, typename Loader::result_type, identity, std::equal_to<id_type>, container_allocator>;
 
 public:
+    /*! @brief Allocator type. */
+    using allocator_type = Allocator;
     /*! @brief Resource type. */
     using value_type = Type;
     /*! @brief Unsigned integer type. */
     using size_type = std::size_t;
     /*! @brief Loader type. */
     using loader_type = Loader;
-    /*! @brief Allocator type. */
-    using allocator_type = Allocator;
     /*! @brief Input iterator type. */
     using iterator = internal::resource_cache_iterator<Type, typename container_type::iterator>;
     /*! @brief Constant input iterator type. */