diff --git a/picamera/array.py b/picamera/array.py
index 3d2b7831..227b4549 100644
--- a/picamera/array.py
+++ b/picamera/array.py
@@ -866,7 +866,7 @@ def __init__(self, formats=('rgb', 'bgr', 'rgba', 'bgra')):
         self.inputs[0].supported_formats = formats
         self.outputs[0].supported_formats = formats
 
-    def _callback(self, port, source_buf):
+    def _handle_frame(self, port, source_buf):
         try:
             target_buf = self.outputs[0].get_buffer(False)
         except PiCameraPortDisabled: