diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index 61b80c622a809e..8a473847f285f2 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -303,11 +303,11 @@ void Base64Slice(const FunctionCallbackInfo<Value>& args) {
 void Copy(const FunctionCallbackInfo<Value> &args) {
   Environment* env = Environment::GetCurrent(args);
 
-  Local<Object> target = args[0]->ToObject(env->isolate());
-
-  if (!HasInstance(target))
+  if (!HasInstance(args[0]))
     return env->ThrowTypeError("first arg should be a Buffer");
 
+  Local<Object> target = args[0]->ToObject(env->isolate());
+
   ARGS_THIS(args.This())
   size_t target_length = target->GetIndexedPropertiesExternalArrayDataLength();
   char* target_data = static_cast<char*>(
diff --git a/test/parallel/test-buffer.js b/test/parallel/test-buffer.js
index 9b16b7b028476a..3cdd862880207a 100644
--- a/test/parallel/test-buffer.js
+++ b/test/parallel/test-buffer.js
@@ -1179,3 +1179,8 @@ var ps = Buffer.poolSize;
 Buffer.poolSize = 0;
 assert.equal(Buffer(1).parent, undefined);
 Buffer.poolSize = ps;
+
+// Test Buffer.copy() segfault
+assert.throws(function() {
+  Buffer(10).copy();
+});