diff --git a/src/ast/mod.rs b/src/ast/mod.rs
index 780751b..b04a5ab 100644
--- a/src/ast/mod.rs
+++ b/src/ast/mod.rs
@@ -415,6 +415,7 @@ impl Parser {
     ///  | StringLiteral
     ///  | IntLiteral
     ///  | ArrayLiteral
+    ///  | BoolLiteral
     ///
     /// ArrayExpression
     ///  : PrimaryExpression "[" Expression "]"
diff --git a/src/lex/token.rs b/src/lex/token.rs
index 7d88d9e..27a45ca 100644
--- a/src/lex/token.rs
+++ b/src/lex/token.rs
@@ -97,9 +97,11 @@ impl Kind {
     pub fn is_start_of_expr(&self) -> bool {
         match self {
             k if k.is_start_of_lhs_expr() => true,
+            Kind::FalseKeyword => true,
             Kind::Minus => true,
             Kind::OBracket => true,
             Kind::OParen => true,
+            Kind::TrueKeyword => true,
             _ => false,
         }
     }
@@ -209,13 +211,15 @@ impl fmt::Display for Kind {
                 Kind::Percent => "percent",
                 Kind::PercentEq => "percenteq",
 
-                Kind::ElseKeyword => "keyword",
                 Kind::DependKeyword => "keyword",
+                Kind::ElseKeyword => "keyword",
+                Kind::FalseKeyword => "keyword",
                 Kind::IfKeyword => "keyword",
                 Kind::IncludeKeyword => "keyword",
                 Kind::SetKeyword => "keyword",
                 Kind::SourceKeyword => "keyword",
                 Kind::TargetKeyword => "keyword",
+                Kind::TrueKeyword => "keyword",
                 Kind::TypeKeyword => "keyword",
 
                 Kind::StringLiteral => "string",