diff --git a/libisoburn.spec b/libisoburn.spec
index e8c3414..edff3bd 100644
--- a/libisoburn.spec
+++ b/libisoburn.spec
@@ -186,7 +186,7 @@ fi
   --slave %{_mandir}/man1/mkisofs.1.gz mkisofs-mkisofsman %{_mandir}/man1/xorrisofs%{?variant}.1.gz
 
 %preun -n xorriso%{?variant}
-if [ $1 = 0 ]; then
+if [ $1 -eq 0 ]; then
 %if 0%{?rhel} == 7
   /sbin/install-info --delete %{_infodir}/xorrecord.info.gz %{_infodir}/dir || :
   /sbin/install-info --delete %{_infodir}/xorriso.info.gz %{_infodir}/dir || :