diff --git a/fastapi/_compat/v1.py b/fastapi/_compat/v1.py
index fdafbef96..0efc250c1 100644
--- a/fastapi/_compat/v1.py
+++ b/fastapi/_compat/v1.py
@@ -38,6 +38,7 @@ if not PYDANTIC_V2:
     from pydantic.fields import (  # type: ignore[attr-defined]
         SHAPE_FROZENSET,
         SHAPE_LIST,
+        SHAPE_MAPPING,
         SHAPE_SEQUENCE,
         SHAPE_SET,
         SHAPE_SINGLETON,