diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index 71afbd7156..d5b68aa7c5 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -339,14 +339,6 @@ Handle<Value> Buffer::Utf8ByteLength(const Arguments &args) {
 }
 
 
-bool Buffer::HasInstance(Handle<Value> val) {
-  if (!val->IsObject()) return false;
-  Local<Object> obj = val->ToObject();
-  return constructor_template->HasInstance(obj);
-}
-
-
-
 void Buffer::Initialize(Handle<Object> target) {
   HandleScope scope;
 
diff --git a/src/node_buffer.h b/src/node_buffer.h
index ae3b6bfbff..78059be7ef 100644
--- a/src/node_buffer.h
+++ b/src/node_buffer.h
@@ -31,7 +31,11 @@ struct Blob_;
 class Buffer : public ObjectWrap {
  public:
   static void Initialize(v8::Handle<v8::Object> target);
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static inline bool HasInstance(v8::Handle<v8::Value> val) {
+    if (!val->IsObject()) return false;
+    v8::Local<v8::Object> obj = val->ToObject();
+    return constructor_template->HasInstance(obj);
+  }
 
   const char* data() const { return data_; }
   size_t length() const { return length_; }