diff -ur xfce4-diskperf-plugin-2.3.0.orig/configure.ac xfce4-diskperf-plugin-2.3.0/configure.ac
--- xfce4-diskperf-plugin-2.3.0.orig/configure.ac	2011-01-21 02:03:08.000000000 +0100
+++ xfce4-diskperf-plugin-2.3.0/configure.ac	2011-09-19 14:20:05.642999822 +0200
@@ -56,6 +56,8 @@
 XDT_CHECK_PACKAGE([LIBXFCE4PANEL], [libxfce4panel-1.0], [4.3.90])
 XDT_CHECK_PACKAGE([LIBXFCEGUI4], [libxfcegui4-1.0], [4.3.90])
 
+AC_SEARCH_LIBS(sin, m)
+
 dnl ***********************************
 dnl *** Check for debugging support ***
 dnl ***********************************