diff --git a/mpfr.changes b/mpfr.changes
index 6faf09b..c19b918 100644
--- a/mpfr.changes
+++ b/mpfr.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu May 17 06:37:28 UTC 2018 - antoine.belvire@opensuse.org
+
+- Fix %install_info_delete usage:
+  * It has to be performed in %preun not in %postun.
+  * See https://en.opensuse.org/openSUSE:Packaging_Conventions_RPM_Macros#.25install_info_delete.
+
 -------------------------------------------------------------------
 Wed May  2 08:48:20 UTC 2018 - rguenther@suse.com
 
diff --git a/mpfr.spec b/mpfr.spec
index 3256961..2f32908 100644
--- a/mpfr.spec
+++ b/mpfr.spec
@@ -56,7 +56,8 @@ Summary:        Development files for the GNU multiple-precision floating-point
 Group:          Development/Libraries/C and C++
 Requires:       gmp-devel
 Requires:       libmpfr6 = %{version}
-Requires(pre):  %{install_info_prereq}
+Requires(post):  %{install_info_prereq}
+Requires(preun):  %{install_info_prereq}
 
 %description devel
 Development files for the GNU multiple-precision floating-point library.
@@ -92,10 +93,11 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %post devel
 %install_info --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
-%postun -n libmpfr6 -p /sbin/ldconfig
-%postun devel
+%preun devel
 %install_info_delete --info-dir=%{_infodir} %{_infodir}/%{name}.info.gz
 
+%postun -n libmpfr6 -p /sbin/ldconfig
+
 %files -n libmpfr6
 %{_libdir}/libmpfr.so.6*