diff --git a/henceforth/src/compiler/instruction.rs b/henceforth/src/compiler/instruction.rs
index b6f3aa5..59f8ca1 100644
--- a/henceforth/src/compiler/instruction.rs
+++ b/henceforth/src/compiler/instruction.rs
@@ -66,6 +66,9 @@ pub enum Instruction {
     Mod,
     AsmQuote(String),
 
+    True,
+    False,
+
     Multiple {
         instruction: Box<Self>,
         count: usize,
@@ -535,6 +538,14 @@ impl compiler::Compilable<compiler::Compiler, hence::parser::ast::Body> for Inst
                     name: "std_set".to_string(),
                     args: vec![hence::arg::Arg::Variable("MEM_ALLOC_PTR".to_string())],
                 },
+                hence::parser::ast::Node::Call {
+                    name: "tsr".to_string(),
+                    arg: Some(hence::arg::Arg::Variable("CORE_REG_A".to_string())),
+                },
+                hence::parser::ast::Node::Call {
+                    name: "tls".to_string(),
+                    arg: None,
+                },
             ]),
             Instruction::Dot => Ok(vec![
                 hence::parser::ast::Node::MacroCall {
@@ -1263,6 +1274,15 @@ impl compiler::Compilable<compiler::Compiler, hence::parser::ast::Body> for Inst
                 None => bail!("Condition by index not found: {}", x),
             },
 
+            Instruction::True => Ok(vec![hence::parser::ast::Node::Call {
+                name: "push".to_string(),
+                arg: Some(hence::arg::Arg::Variable("TRUE".to_string())),
+            }]),
+            Instruction::False => Ok(vec![hence::parser::ast::Node::Call {
+                name: "push".to_string(),
+                arg: Some(hence::arg::Arg::Variable("FALSE".to_string())),
+            }]),
+
             Instruction::Multiple { instruction, count } => {
                 if *count == 0 {
                     Ok(vec![])
@@ -1536,6 +1556,8 @@ impl Instruction {
             "*" => Some(Instruction::Times),
             "/" => Some(Instruction::Divide),
             "mod" => Some(Instruction::Mod),
+            "true" => Some(Instruction::True),
+            "false" => Some(Instruction::False),
             _ => None,
         }
     }