diff --git a/src/objects/codeobject_ser.c b/src/objects/codeobject_ser.c
index 4e8e1226..76628ded 100644
--- a/src/objects/codeobject_ser.c
+++ b/src/objects/codeobject_ser.c
@@ -360,3 +360,7 @@ const char* CodeObject__loads(CodeObject* co, const void* data, int size) {
     c11_deserializer__dtor(&d);
     return NULL;
 }
+
+#undef CODEOBJECT_MAGIC
+#undef CODEOBJECT_VER_MAJOR
+#undef CODEOBJECT_VER_MINOR