http://bugzilla.xfce.org/show_bug.cgi?id=6609
http://bugs.gentoo.org/show_bug.cgi?id=331505

--- configure.in
+++ configure.in
@@ -35,6 +35,7 @@
 AC_PROG_CC()
 AC_PROG_LD()
 AC_PROG_INSTALL()
+AC_PROG_LIBTOOL()
 AC_PROG_INTLTOOL()
 
 dnl **********************************
@@ -51,6 +52,7 @@
 dnl *** Check for required packages ***
 dnl ***********************************
 XDT_CHECK_PACKAGE([LIBXFCE4PANEL], [libxfce4panel-1.0], [4.3.90])
+XDT_CHECK_PACKAGE([LIBXFCEGUI4], [libxfcegui4-1.0], [4.3.90])
 
 dnl ***********************************
 dnl *** Check for debugging support ***
--- panel-plugin/Makefile.am
+++ panel-plugin/Makefile.am
@@ -22,10 +22,12 @@
 	devperf.h
 
 xfce4_diskperf_plugin_CFLAGS =					\
-	$(LIBXFCE4PANEL_CFLAGS)
+	$(LIBXFCE4PANEL_CFLAGS)					\
+	$(LIBXFCEGUI4_CFLAGS)
 
 xfce4_diskperf_plugin_LDADD=					\
-	$(LIBXFCE4PANEL_LIBS)
+	$(LIBXFCE4PANEL_LIBS)					\
+	$(LIBXFCEGUI4_LIBS)
 
 #
 # Desktop file