diff --git a/README.md b/README.md
index 83fcf7d8..25e942f8 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 cquery is not yet production ready. I use it day-to-day, but there are still
 a number of rough edges.
 
+**WARNING**: Master is broken for large repros right now. Use commit 809276d29390798ab2a0886907332985ab7cc13b.
+
 # cquery
 
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