Index: Makefile
===================================================================
--- Makefile	(revision 462654)
+++ Makefile	(working copy)
@@ -26,7 +26,9 @@
 PORTDATA=	*
 PORTDOCS=	CREDITS NEWS README
 
-OPTIONS_DEFINE=	DOCS
+OPTIONS_DEFINE=	CACHE_ICONS DOCS
+CACHE_ICONS_DESC=	Update icon cache after installation (GTK+)
+CACHE_ICONS_RUN_DEPENDS=	gtk-update-icon-cache:graphics/gtk-update-icon-cache
 
 post-patch:
 	@${REINPLACE_CMD} -e '/INSTALLS/s/man //' \
@@ -36,6 +38,13 @@
 	${INSTALL_MAN} ${WRKSRC}/resources/unix/focuswriter.1 \
 		${STAGEDIR}${MANPREFIX}/man/man1
 
+post-install-CACHE_ICONS-on:
+.for d in share/icons/hicolor
+	@${ECHO_CMD} "@rmtry ${d}/icon-theme.cache" >> ${TMPPLIST}
+	@${ECHO_CMD} "@postexec ${LOCALBASE}/bin/gtk-update-icon-cache -q -f %D/${d} 2>/dev/null || /usr/bin/true" >> ${TMPPLIST}
+	@${ECHO_CMD} "@postunexec ${LOCALBASE}/bin/gtk-update-icon-cache -q -f %D/${d} 2>/dev/null || /usr/bin/true" >> ${TMPPLIST}
+.endfor
+
 post-install-DOCS-on:
 	cd ${WRKSRC} && ${COPYTREE_SHARE} "${PORTDOCS}" ${STAGEDIR}${DOCSDIR}