diff --git a/tool/release.sh b/tool/release.sh
index d450546cb0..6b8cf3ea50 100755
--- a/tool/release.sh
+++ b/tool/release.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 # Bash version 3.2+ is required for regexp
+# Usage:
+#   tool/release.sh 3.0.0
+#   tool/release.sh 3.0.0-rc1
 
 EXTS='.tar.gz .tar.xz .zip'