diff --git a/copier/cli.py b/copier/cli.py
index 1942ce517..10e3a178f 100644
--- a/copier/cli.py
+++ b/copier/cli.py
@@ -84,7 +84,10 @@ def inner(*args: P.args, **kwargs: P.kwargs) -> int:
             return 0b100
 
     # See https://github.com/copier-org/copier/pull/1513
-    inner.__signature__ = inspect.signature(method, eval_str=True)  # type: ignore[attr-defined]
+    if sys.version_info >= (3, 10):
+        inner.__signature__ = inspect.signature(method, eval_str=True)  # type: ignore[attr-defined]
+    else:
+        inner.__signature__ = inspect.signature(method)  # type: ignore[attr-defined]
 
     return inner