diff --git a/fmt.spec b/fmt.spec
index 2cae4e1..3466bdc 100644
--- a/fmt.spec
+++ b/fmt.spec
@@ -1,5 +1,3 @@
-%undefine __cmake_in_source_build
-
 Name:           fmt
 Version:        8.1.1
 Release:        5%{?dist}