diff --git a/kf5.spec b/kf5.spec
index 69d1b6c..e626b7b 100644
--- a/kf5.spec
+++ b/kf5.spec
@@ -1,6 +1,6 @@
 Name:    kf5
 Version: 5.72.0
-Release: 4%{?dist}
+Release: 5%{?dist}
 Summary: Filesystem and RPM macros for KDE Frameworks 5
 License: BSD
 URL:     http://www.kde.org
@@ -82,6 +82,9 @@ sed -i \
 
 
 %changelog
+* Wed Jul 29 2020 Rex Dieter <rdieter@fedoraproject.org> - 5.72.0-5
+- %%cmake_kf5: +%%undefine __cmake_in_source_build
+
 * Tue Jul 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 5.72.0-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/macros.kf5 b/macros.kf5
index 0c23cc7..fb0b67f 100644
--- a/macros.kf5
+++ b/macros.kf5
@@ -15,7 +15,8 @@
 %_kf5_qmldir %_kf5_archdatadir/qml
 %_kf5_version @@KF5_VERSION@@
 
-%cmake_kf5 \
+%cmake_kf5 \\\
+  %undefine __cmake_in_source_build \
   QTDIR="%{_qt5_prefix}" ; export QTDIR ; \
   PATH="%{_qt5_bindir}:$PATH" ; export PATH ; \
   CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS ; \