diff --git a/src/increase/_compat.py b/src/increase/_compat.py
index 7b5f798f1..f8e73e40a 100644
--- a/src/increase/_compat.py
+++ b/src/increase/_compat.py
@@ -147,6 +147,7 @@ class GenericModel(pydantic.BaseModel):
             ...
 
     else:
+        import pydantic.generics
 
         class GenericModel(pydantic.generics.GenericModel, pydantic.BaseModel):
             ...