diff --git a/nmap.spec b/nmap.spec
index 8cfb68a..55d7976 100644
--- a/nmap.spec
+++ b/nmap.spec
@@ -2,7 +2,7 @@
 Summary: Network exploration tool and security scanner
 Name: nmap
 Version: 5.21
-Release: 5%{?dist}
+Release: 6%{?dist}
 # nmap is GPLv2
 # zenmap is GPLv2 and LGPLv2+ (zenmap/higwidgets) and GPLv2+ (zenmap/radialnet)
 # libdnet-stripped is BSD (advertising clause rescinded by the Univ. of California in 1999) with some parts as Public Domain (crc32)
@@ -116,6 +116,18 @@ popd
 %find_lang nmap --with-man
 %find_lang zenmap
 
+%post
+touch --no-create %{_datadir}/icons/hicolor &>/dev/null || :
+
+%postun
+if [ $1 -eq 0 ] ; then
+    touch --no-create %{_datadir}/icons/hicolor &>/dev/null
+    gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
+fi
+
+%posttrans
+gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
+
 %clean
 rm -rf $RPM_BUILD_ROOT
 
@@ -143,13 +155,16 @@ rm -rf $RPM_BUILD_ROOT
 %{_bindir}/xnmap
 %{python_sitelib}/*
 %{_datadir}/applications/nmap-zenmap.desktop
-%{_datadir}/icons/*
+%{_datadir}/icons/hicolor/*
 %{_datadir}/zenmap
 %{_mandir}/man1/zenmap.1.gz
 %{_mandir}/man1/nmapfe.1.gz
 %{_mandir}/man1/xnmap.1.gz
 
 %changelog
+* Wed Aug 11 2010 Michal Hlavinka <mhlavink@redhat.com> - 2:5.21-6
+- update icon cache after package install
+
 * Wed Jul 21 2010 David Malcolm <dmalcolm@redhat.com> - 2:5.21-5
 - Rebuilt for https://fedoraproject.org/wiki/Features/Python_2.7/MassRebuild