diff --git a/README.md b/README.md
index 272bf2bc..2e1a6167 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # PyO3
 
+**Note: Pyo3 doesn't compile on 1.31.0 nightly due to https://github.com/rust-lang/rust/issues/55380**
+
 [![Build Status](https://travis-ci.org/PyO3/pyo3.svg?branch=master)](https://travis-ci.org/PyO3/pyo3)
 [![Build Status](https://ci.appveyor.com/api/projects/status/github/PyO3/pyo3?branch=master&svg=true)](https://ci.appveyor.com/project/fafhrd91/pyo3)
 [![crates.io](http://meritbadge.herokuapp.com/pyo3)](https://crates.io/crates/pyo3)