diff --git a/reflex/config.py b/reflex/config.py
index 436611f48..219024f7c 100644
--- a/reflex/config.py
+++ b/reflex/config.py
@@ -257,7 +257,7 @@ class EnvironmentVariables:
         for field in dataclasses.fields(self):
             raw_value = os.getenv(field.name, None)
 
-            field.type = type_hints[field.name] or field.type
+            field.type = type_hints.get(field.name) or field.type
 
             value = (
                 interpret_env_var_value(raw_value, field)