diff --git a/modules/python/src2/api b/modules/python/src2/api
index dc02e4ab0..0f09176b7 100644
--- a/modules/python/src2/api
+++ b/modules/python/src2/api
@@ -1595,6 +1595,7 @@ GrabFrame int
   CvCapture* capture
 RetrieveFrame ROIplImage*
   CvCapture* capture
+  int index 0
 QueryFrame ROIplImage*
   CvCapture* capture
 GetCaptureProperty double