diff --git a/kf6-prison/kf6-prison.spec b/kf6-prison/kf6-prison.spec
index 3d94984..9093fb3 100644
--- a/kf6-prison/kf6-prison.spec
+++ b/kf6-prison/kf6-prison.spec
@@ -67,6 +67,14 @@ if [ -f "%{buildroot}%{_kf6_libdir}/libKF6PrisonScanner.so.6" ] || [ -f "%{build
     echo "%{_kf6_libdir}/libKF6PrisonScanner.so.%{version}" >> prison-runtime.files
 fi
 
+: > prison-devel.files
+if [ -d "%{buildroot}%{_kf6_includedir}/PrisonScanner" ]; then
+    echo "%{_kf6_includedir}/PrisonScanner/" >> prison-devel.files
+fi
+if [ -f "%{buildroot}%{_kf6_libdir}/libKF6PrisonScanner.so" ]; then
+    echo "%{_kf6_libdir}/libKF6PrisonScanner.so" >> prison-devel.files
+fi
+
 %files -f prison-runtime.files
 %license LICENSES/*
 %doc README.md
@@ -76,12 +84,10 @@ fi
 %{_kf6_libdir}/libKF6Prison.so.%{version}
 %{_kf6_qmldir}/org/kde/prison/
 
-%files devel
+%files devel -f prison-devel.files
 %{_kf6_cmakedir}/KF6Prison/
 %{_kf6_includedir}/Prison/
-%{_kf6_includedir}/PrisonScanner/
 %{_kf6_libdir}/libKF6Prison.so
-%{_kf6_libdir}/libKF6PrisonScanner.so
 
 %changelog
 %{?autochangelog}