diff --git a/doc/array_buffer.md b/doc/array_buffer.md
index e7217d73a..998a2f2de 100644
--- a/doc/array_buffer.md
+++ b/doc/array_buffer.md
@@ -59,8 +59,8 @@ static Napi::ArrayBuffer Napi::ArrayBuffer::New(napi_env env,
 - `[in] externalData`: The pointer to the external data to wrap.
 - `[in] byteLength`: The length of the `externalData`, in bytes.
 - `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
-  destroyed. It must implement `operator()`, accept a `void*` (which is the
-  `externalData` pointer), and return `void`.
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, void*)`,
+  and return `void`.
 
 Returns a new `Napi::ArrayBuffer` instance.
 
@@ -85,9 +85,9 @@ static Napi::ArrayBuffer Napi::ArrayBuffer::New(napi_env env,
 - `[in] env`: The environment in which to create the `Napi::ArrayBuffer` instance.
 - `[in] externalData`: The pointer to the external data to wrap.
 - `[in] byteLength`: The length of the `externalData`, in bytes.
-- `[in] finalizeCallback`: The function to be called when the `Napi::ArrayBuffer` is
-  destroyed. It must implement `operator()`, accept a `void*` (which is the
-  `externalData` pointer) and `Hint*`, and return `void`.
+- `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, void*, Hint*)`,
+  and return `void`.
 - `[in] finalizeHint`: The hint to be passed as the second parameter of the
   finalize callback.
 
diff --git a/doc/buffer.md b/doc/buffer.md
index 8f76b200d..bbe1fb6d0 100644
--- a/doc/buffer.md
+++ b/doc/buffer.md
@@ -56,9 +56,9 @@ static Napi::Buffer<T> Napi::Buffer::New(napi_env env,
 - `[in] env`: The environment in which to create the `Napi::Buffer` object.
 - `[in] data`: The pointer to the external data to expose.
 - `[in] length`: The number of `T` elements in the external data.
-- `[in] finalizeCallback`: The function to be called when the `Napi::Buffer` is
-  destroyed. It must implement `operator()`, accept a `T*` (which is the
-  external data pointer), and return `void`.
+- `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, T*)`,
+  and return `void`.
 
 Returns a new `Napi::Buffer` object.
 
@@ -82,9 +82,9 @@ static Napi::Buffer<T> Napi::Buffer::New(napi_env env,
 - `[in] env`: The environment in which to create the `Napi::Buffer` object.
 - `[in] data`: The pointer to the external data to expose.
 - `[in] length`: The number of `T` elements in the external data.
-- `[in] finalizeCallback`: The function to be called when the `Napi::Buffer` is
-  destroyed. It must implement `operator()`, accept a `T*` (which is the
-  external data pointer) and `Hint*`, and return `void`.
+- `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, T*, Hint*)`,
+  and return `void`.
 - `[in] finalizeHint`: The hint to be passed as the second parameter of the
   finalize callback.
 
diff --git a/doc/external.md b/doc/external.md
index 4022b61dd..4a086b421 100644
--- a/doc/external.md
+++ b/doc/external.md
@@ -29,7 +29,9 @@ static Napi::External Napi::External::New(napi_env env,
 
 - `[in] env`: The `napi_env` environment in which to construct the `Napi::External` object.
 - `[in] data`: The arbitrary C++ data to be held by the `Napi::External` object.
-- `[in] finalizeCallback`: A function called when the `Napi::External` object is released by the garbage collector accepting a T* and returning void.
+- `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, T*)`,
+  and return `void`.
 
 Returns the created `Napi::External<T>` object.
 
@@ -45,7 +47,9 @@ static Napi::External Napi::External::New(napi_env env,
 
 - `[in] env`: The `napi_env` environment in which to construct the `Napi::External` object.
 - `[in] data`: The arbitrary C++ data to be held by the `Napi::External` object.
-- `[in] finalizeCallback`: A function called when the `Napi::External` object is released by the garbage collector accepting T* and Hint* parameters and returning void.
+- `[in] finalizeCallback`: A function to be called when the `Napi::ArrayBuffer` is
+  destroyed. It must implement `operator()` with parameters `(Napi::Env, T*, Hint*)`,
+  and return `void`.
 - `[in] finalizeHint`: A hint value passed to the `finalizeCallback` function.
 
 Returns the created `Napi::External<T>` object.