diff --git a/giac.changes b/giac.changes
index a2a2665..233c40a 100644
--- a/giac.changes
+++ b/giac.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jul 15 23:40:29 UTC 2016 - avvissu@yandex.by
+
+- Fix postun scriptlet failed: 
+  * use install_info_delete instead of info_del
+
 -------------------------------------------------------------------
 Sat Jan  2 21:21:49 UTC 2016 - avvissu@yandex.ru
 
diff --git a/giac.spec b/giac.spec
index 0888b48..acb9a8d 100644
--- a/giac.spec
+++ b/giac.spec
@@ -53,6 +53,8 @@ BuildRequires:  pkgconfig(xext)
 BuildRequires:  pkgconfig(xft)
 BuildRequires:  pkgconfig(xinerama)
 Recommends:     giac-doc
+Requires(post): %install_info_prereq
+Requires(preun): %install_info_prereq
 %if !%{with cocoa}
 BuildRequires:  pkgconfig(ao)
 %endif
@@ -140,14 +142,16 @@ find %{buildroot}%{_datadir}/%{name}/doc -type f -empty -exec rm -f {} \;
 %info_add %{name}_es.info
 %info_add %{name}_us.info
 
+%preun
+if [ $1 -eq 0 ]; then
+%install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}_es.info%{ext_info}
+%install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}_us.info%{ext_info}
+fi
+
 %postun
 %mime_database_postun
 %desktop_database_postun
 %icon_theme_cache_postun
-if [ $1 = 0 ]; then
-  %info_del %{name}_es.info
-  %info_del %{name}_us.info
-fi
 
 %post   -n lib%{name}%{soname} -p /sbin/ldconfig
 %postun -n lib%{name}%{soname} -p /sbin/ldconfig