diff --git a/sylpheed/Makefile.am b/sylpheed/Makefile.am
index 249992c..d984dde 100644
--- a/sylpheed/Makefile.am
+++ b/sylpheed/Makefile.am
@@ -39,8 +39,15 @@ release: distdir
 
 install-data-local:
 	@$(NORMAL_INSTALL)
-	$(mkinstalldirs) $(DESTDIR)$(datadir)/pixmaps; \
-	$(INSTALL_DATA) $(srcdir)/sylpheed-64x64.png $(DESTDIR)$(datadir)/pixmaps/sylpheed.png;
+	$(mkinstalldirs) $(DESTDIR)$(datadir)/icons/hicolor/48x48/apps; \
+	$(INSTALL_DATA) $(srcdir)/sylpheed.png \
+		$(DESTDIR)$(datadir)/icons/hicolor/48x48/apps/sylpheed.png; \
+	$(mkinstalldirs) $(DESTDIR)$(datadir)/icons/hicolor/64x64/apps; \
+	$(INSTALL_DATA) $(srcdir)/sylpheed-64x64.png \
+		$(DESTDIR)$(datadir)/icons/hicolor/64x64/apps/sylpheed.png; \
+	$(mkinstalldirs) $(DESTDIR)$(datadir)/icons/hicolor/128x128/apps; \
+	$(INSTALL_DATA) $(srcdir)/sylpheed-128x128.png \
+		$(DESTDIR)$(datadir)/icons/hicolor/128x128/apps/sylpheed.png;
 
 desktop_DATA = sylpheed.desktop
 desktopdir = $(datadir)/applications