1 files changed, 5 insertions, 1 deletions
diff --git a/src/makefile/mod.rs b/src/makefile/mod.rs
index 24996a8..1f0b8a2 100644
--- a/src/makefile/mod.rs
+++ b/src/makefile/mod.rs
@@ -348,7 +348,11 @@ impl fmt::Display for Makefile<'_> {
             writeln!(f, "{}\n{:=^width$}", t, "", width = t.len())
         };
         header(f, "Inference Rules")?;
-        for rule in &self.inference_rules {
+        for rule in self
+            .inference_rules
+            .iter()
+            .chain(self.builtin_inference_rules.iter())
+        {
             writeln!(f, "{}", rule)?;
         }
         writeln!(f)?;