diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -119,6 +119,7 @@ Parity check aided successive cancellation [list decoding](https://en.wikipedia.
 ### [pac_list_decoder.hh](pac_list_decoder.hh)
 
 Successive cancellation [list decoding](https://en.wikipedia.org/wiki/List_decoding) of [Polarization-Adjusted Convolutional codes](https://en.wikipedia.org/wiki/Polar_code_(coding_theory)#PAC_codes).
+![OSD, PAC and CRC](osd_pac_crc.png)
 
 ### [osd.hh](osd.hh)
 
diff --git a/osd_pac_crc.png b/osd_pac_crc.png
new file mode 100644
index 0000000..7306178
Binary files /dev/null and b/osd_pac_crc.png differ