diff --git a/lib/parser/parser.cc b/lib/parser/parser.cc
index f416c19f..cdb6f55f 100644
--- a/lib/parser/parser.cc
+++ b/lib/parser/parser.cc
@@ -237,23 +237,12 @@ factor_2 (Mux::Tokens& tokens, Node::Type& op, ProcPtr proc,
 	switch (token.type) {
 	case Token::Type::And: {
 		tokens.pop_front();
-		const auto token2 = look_ahead(tokens);
-		if (token2.type == Token::Type::Not) { // AND NOT is a unit
-			tokens.pop_front();
-			op = Node::Type::OpAndNot;
-		} else
-			op = Node::Type::OpAnd;
+		op = Node::Type::OpAnd;
 	} break;
 	case Token::Type::Open:
 	case Token::Type::Data:
 		op = Node::Type::OpAnd; // implicit AND
 		break;
-	case Token::Type::Not:
-		tokens.pop_front();
-		op = Node::Type::OpAndNot; // implicit AND NOT
-		break;
-
-
 	default:
 		return empty();
 	}