diff --git a/ksigner.spec.in b/ksigner.spec.in
index 7112863..b8fa5e2 100644
--- a/ksigner.spec.in
+++ b/ksigner.spec.in
@@ -58,6 +58,9 @@ echo "  2. Reboot your system"
 echo "  3. In MOK Manager: Enroll MOK → Continue → Yes → Enter password"
 echo "==========================================="
 
+%postun
+rm -f /var/log/ksigner.log || :
+
 %files
 %license LICENSE
 %doc README.md