diff --git a/scripts/config.sh b/scripts/config.sh
index f697b169de80..10c0ec0e293f 100644
--- a/scripts/config.sh
+++ b/scripts/config.sh
@@ -1,3 +1,5 @@
+# Note to people running shellcheck: this file should only be sourced, not executed directly.
+
 set -e
 
 unamestr=$(uname)