diff --git a/README.md b/README.md
index 16285cd..1349fce 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,8 @@ CentOS6, CentOS7 and Ubuntu 14 are used for testing, although no guarantees are
 
 Only bash as a default shell is supported at the moment, users with a different default have reported many problems.
 
+Warning: Ubuntu16 has issues with pygsl and ROOT installation at the moment. Ubuntu16 not yet supported.
+Please get in touch if you would like to make enquiries about this.
 
 Introduction:
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