diff --git a/src/base-type.typ b/src/base-type.typ
index 5a10270..7eea03b 100644
--- a/src/base-type.typ
+++ b/src/base-type.typ
@@ -43,7 +43,7 @@
           it,
           scope: scope,
           ctx: ctx,
-          message: "Expected " + types.join(
+          message: "Expected " + self.types.map(repr).join(
             ", ",
             last: " or ",
           ) + ". Got " + type(it),
@@ -113,4 +113,4 @@
       assert(ctx.soft-error, message: display)
     },
   )
-}
\ No newline at end of file
+}