diff --git a/unison213.spec b/unison213.spec
index 18b66b2..230506d 100644
--- a/unison213.spec
+++ b/unison213.spec
@@ -46,8 +46,8 @@ BuildRequires: desktop-file-utils
 BuildRequires: gtk2-devel
 %endif
 
-Requires(post):   %{_sbindir}/alternatives
-Requires(postun): %{_sbindir}/alternatives
+Requires(posttrans): %{_sbindir}/alternatives
+Requires(postun):    %{_sbindir}/alternatives
 
 # Enforce the switch from unison to unisonN.NN
 Obsoletes: unison < 2.27.57-3
@@ -109,7 +109,7 @@ desktop-file-install --vendor fedora \
 %clean
 rm -rf %{buildroot}
 
-%post
+%posttrans
 %if 0%{?build_gui}
 %define build_gui_slash \
 %else