diff --git a/README.md b/README.md
index 468a383..9c19738 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@ PiShrink is a bash script that automatically shrink a pi image that will then re
 If the `-s` option is given the script will skip the autoexpanding part of the process.  If you specify the `newimagefile.img` parameter, the script will make a copy of `imagefile.img` and work off that. You will need enough space to make a full copy of the image to use that option.
 
 ## Prerequisites ##
+If you are trying to shrink a [NOOBS](https://github.com/raspberrypi/noobs) image it will likely fail. This is due to [NOOBS paritioning](https://github.com/raspberrypi/noobs/wiki/NOOBS-partitioning-explained) being significantly different than Raspian's. Hopefully PiShrink will be able to support NOOBS in the near future.
+
 If using Ubuntu, you will likely see an error about `e2fsck` being out of date and `metadata_csum`. The simplest fix for this is to use Ubuntu 16.10 and up, as it will save you a lot of hassle in the long run.
 
 ## Installation ##