diff --git a/imagelib/warp.py b/imagelib/warp.py
index c1f575f..aa0f602 100644
--- a/imagelib/warp.py
+++ b/imagelib/warp.py
@@ -47,5 +47,5 @@ def warp_by_params (params, img, warp, transform, flip, is_border_replicate):
     if transform:
         img = cv2.warpAffine( img, params['rmat'], (params['w'], params['w']), borderMode=(cv2.BORDER_REPLICATE if is_border_replicate else cv2.BORDER_CONSTANT), flags=cv2.INTER_CUBIC )
     if flip and params['flip']:
-        img = img[:,::-1,:]
+        img = img[:,::-1,...]
     return img
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