diff -up cups-1.4.1/backend/usb-unix.c.function-decl cups-1.4.1/backend/usb-unix.c
--- cups-1.4.1/backend/usb-unix.c.function-decl	2009-09-14 17:36:06.087996470 +0100
+++ cups-1.4.1/backend/usb-unix.c	2009-09-14 17:36:13.656996607 +0100
@@ -605,7 +605,7 @@ open_device(const char *uri,		/* I - Dev
  * 'side_cb()' - Handle side-channel requests...
  */
 
-static void
+static int
 side_cb(int         print_fd,		/* I - Print file */
         int         device_fd,		/* I - Device file */
         int         snmp_fd,		/* I - SNMP socket (unused) */