diff --git a/dissect/cstruct/types/base.py b/dissect/cstruct/types/base.py
index 98763da..8a7b1c1 100644
--- a/dissect/cstruct/types/base.py
+++ b/dissect/cstruct/types/base.py
@@ -88,7 +88,7 @@ def write(cls, stream: BinaryIO, value: Any) -> int:
         """
         return cls._write(stream, value)
 
-    def dumps(cls: MetaType, value: Any) -> bytes:
+    def dumps(cls, value: Any) -> bytes:
         """Dump a value to a byte string.
 
         Args: