diff --git a/bin/debug b/bin/debug
index 9b53b9c..76bcd8d 100755
--- a/bin/debug
+++ b/bin/debug
@@ -104,6 +104,8 @@ function formatValue(value: Value): string {
   } else if (value.type === 'function') {
     const params = value.params.join(', ')
     return `${colors.dim}<fn(${params})>${colors.reset}`
+  } else if (value.type === 'native') {
+    return `${colors.dim}<native>${colors.reset}`
   }
   return String(value)
 }
diff --git a/bin/repl b/bin/repl
index 7a15277..b981563 100755
--- a/bin/repl
+++ b/bin/repl
@@ -38,6 +38,8 @@ function formatValue(value: Value): string {
   } else if (value.type === 'function') {
     const params = value.params.join(', ')
     return `${colors.dim}<fn(${params})>${colors.reset}`
+  } else if (value.type === 'native') {
+    return `${colors.dim}<native>${colors.reset}`
   }
   return String(value)
 }