diff --git a/config/punctuation/default.conf b/config/punctuation/default.conf
index 880dad50..a3bbd7c3 100644
--- a/config/punctuation/default.conf
+++ b/config/punctuation/default.conf
@@ -69,5 +69,5 @@ regex;[\s*|'|"]->[\s*|'|"]:===:arrow right
 # or
 #([ |^])<-([ ,.!?$]):===:arrow left\2
 regex;[\s*|'|"]<-[\s*|'|"]:===:arrow left
-regex;[\s*|'|"][Oo][Oo][\s*|'|"]:===:WTF?
+regex;[\s*|'|"](Oo)|(oO)[\s*|'|"]:===:WTF?
 regex;[\s*|'|"]\^\^[\s*|'|"]:===:enjoy smile