diff --git a/CHANGELOG.md b/CHANGELOG.md
index 360524c..6dd5d7a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.7.1 (unreleased)
+
+### Bugfixes
+* Trying to invoke an undefined macro correctly did not report the macro as undefined ([#195](https://github.com/datatrash/mos/issues/195))
+
 ## 0.7.0 (2021-06-18)
 
 ### New features
diff --git a/mos-core/src/codegen/mod.rs b/mos-core/src/codegen/mod.rs
index 536bc69..a93924c 100644
--- a/mos-core/src/codegen/mod.rs
+++ b/mos-core/src/codegen/mod.rs
@@ -1018,6 +1018,12 @@ impl CodegenContext {
 
                         Ok(())
                     })?;
+                } else {
+                    self.undefined.insert(UndefinedSymbol {
+                        scope_nx: self.current_scope_nx,
+                        id: name.data.clone().into(),
+                        span: Some(name.span),
+                    });
                 }
             }
             Token::ProgramCounterDefinition { value, .. } => {
@@ -2096,6 +2102,16 @@ pub mod tests {
         Ok(())
     }
 
+    #[test]
+    fn cannot_use_unknown_macros() -> CoreResult<()> {
+        let err = test_codegen("foo(1)").err().unwrap();
+        assert_eq!(
+            err.to_string(),
+            "test.asm:1:1: error: unknown identifier: foo"
+        );
+        Ok(())
+    }
+
     #[test]
     fn can_invoke_uninvoked_macros() -> CoreResult<()> {
         let ctx = test_codegen_with_options(