diff --git a/src/PIL/JpegPresets.py b/src/PIL/JpegPresets.py
index 387844f8e..012bf81b0 100644
--- a/src/PIL/JpegPresets.py
+++ b/src/PIL/JpegPresets.py
@@ -33,7 +33,10 @@ Possible subsampling values are 0, 1 and 2 that correspond to 4:4:4, 4:2:2 and
 4:2:0.
 
 You can get the subsampling of a JPEG with the
-`JpegImagePlugin.get_subsampling(im)` function.
+`JpegImagePlugin.get_sampling(im)` function.
+
+In JPEG compressed data a JPEG marker is used instead of an EXIF tag.
+(ref.: https://www.exiv2.org/tags.html)
 
 
 Quantization tables