diff --git a/legalmd/legal_token.py b/legalmd/legal_token.py
index 8bd14bb..8c9b13e 100644
--- a/legalmd/legal_token.py
+++ b/legalmd/legal_token.py
@@ -106,6 +106,8 @@ class SubrulesItem(mistletoe.block_token.BlockToken):
 		if not match.group(1) and not match.group(2):
 			# Neither an indent nor a label
 			return False
+		if Definition.pattern.match(line):
+			return False
 		return True
 	
 	@classmethod