diff --git a/src/node.h b/src/node.h
index d5691513992adb..025c6b949dc438 100644
--- a/src/node.h
+++ b/src/node.h
@@ -280,12 +280,6 @@ class NODE_EXTERN MultiIsolatePlatform : public v8::Platform {
                                           void* data) = 0;
 };
 
-// Set up some Node.js-specific defaults for `params`, in particular
-// the ArrayBuffer::Allocator if it is provided, memory limits, and
-// possibly a code event handler.
-NODE_EXTERN void SetIsolateCreateParams(v8::Isolate::CreateParams* params,
-                                        ArrayBufferAllocator* allocator
-                                            = nullptr);
 // Set a number of callbacks for the `isolate`, in particular the Node.js
 // uncaught exception listener.
 NODE_EXTERN void SetIsolateUpForNode(v8::Isolate* isolate);