exprs are of type list

1 files changed, 1 insertions, 1 deletions

diff --git a/neb/std/types.py b/neb/std/types.py
index 35dca42..0ce8b52 100644
--- a/neb/std/types.py
+++ b/neb/std/types.py
@@ -27,7 +27,7 @@ TYPES.register("int?", Builtin("int?", interpretIsInt, [Arg("arg", TypeEnum.ANY)
 def interpretIsList(symbol, args, env, ns):
 
     # if it's not a list, we're done
-    if not isinstance(args[0], List):
+    if not (isinstance(args[0], List) or isinstance(args[0], Expr)):
         return Bool(False)
 
     # if the symbol isn't a type, we're done