diff --git a/adblockparser/parser.py b/adblockparser/parser.py
index 4dd6219..dacaa5d 100644
--- a/adblockparser/parser.py
+++ b/adblockparser/parser.py
@@ -269,7 +269,7 @@ def rule_to_regex(cls, rule):
 
         # other | symbols should be escaped
         # we have "|$" in our regexp - do not touch it
-        rule = re.sub("(\|)[^$]", r"\|", rule)
+        rule = re.sub("(\|)(?!\$)", '\|', rule)
 
         return rule