diff -ur thunar-volman-0.5.1.orig/thunar-volman/tvm-input-device.c thunar-volman-0.5.1/thunar-volman/tvm-input-device.c
--- thunar-volman-0.5.1.orig/thunar-volman/tvm-input-device.c	2010-07-26 13:00:06.000000000 +0300
+++ thunar-volman-0.5.1/thunar-volman/tvm-input-device.c	2010-08-07 14:06:51.000000000 +0300
@@ -121,7 +121,9 @@
       if (enabled)
         {
           /* display a detection notification */
+          #ifdef HAVE_LIBNOTIFY
           tvm_notify (icon, summary, message);
+          #endif
 
           /* fetch the command for the input device type and try to run it */
           command = xfconf_channel_get_string (context->channel, command_property, NULL);
diff -ur thunar-volman-0.5.1.orig/thunar-volman/tvm-usb-device.c thunar-volman-0.5.1/thunar-volman/tvm-usb-device.c
--- thunar-volman-0.5.1.orig/thunar-volman/tvm-usb-device.c	2010-07-26 13:00:06.000000000 +0300
+++ thunar-volman-0.5.1/thunar-volman/tvm-usb-device.c	2010-08-07 14:07:15.000000000 +0300
@@ -80,7 +80,9 @@
       if (enabled)
         {
           /* display a detection notification */
+          #ifdef HAVE_LIBNOTIFY
           tvm_notify (icon, summary, message);
+          #endif
 
           /* fetch the command for the input device type and try to run it */
           command = xfconf_channel_get_string (context->channel, command_property, NULL);