diff --git a/spdlog.spec b/spdlog.spec
index a532b89..704ab3a 100644
--- a/spdlog.spec
+++ b/spdlog.spec
@@ -1,5 +1,3 @@
-%undefine __cmake_in_source_build
-
 Name:           spdlog
 Version:        1.10.0
 Release:        1%{?dist}