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diff --git a/README.md b/README.md
index dcf9f0dcea..964637da16 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ Documentation
 [**Full documentation**](https://spack.readthedocs.io/) is available, or
 run `spack help` or `spack help --all`.
 
+For a cheat sheet on Spack syntax, run `spack help --spec`.
+
 Tutorial
 ----------------