diff --git a/plugins/README.md b/plugins/README.md
index a022265b3..8bbd06e2d 100644
--- a/plugins/README.md
+++ b/plugins/README.md
@@ -1,6 +1,6 @@
 # Plugin Directory
 
-Anything file in this directory which is executable and doesn't start
-and doesn't contain ASCII symbols other than '.', '-' or '_' will be
+Any file in this directory which is executable and whose name only
+consists of alphanumeric characters, space, '.', '-' or '\_' will be
 automatically loaded when lightningd starts (unless suppressed with
 commandline options).