diff --git a/README.md b/README.md
index 7e0d96c..6bf03b2 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ P ::= P()
 | ε
 ```
 ...which, due to the first rule, was regrettably indeed left-recursive. That rule should be able to be fixed using the following adjustment, though:
-`P() => P{()}+` (where `{}` denotes a grouping, and `()` still just denote parentheses. In PCRE regex syntax, this would be `(\(\))*`).
+`P() → P{()}+` (where `{}` denotes a grouping, and `()` still just denote parentheses. In PCRE regex syntax, this would be `(\(\))*`).
 
 Note that `S` is just the grammar for one line of parentheses, without the line-break character of end-of-file part of the specification taken into account.
 The full grammar is: