Description: Fix "storage size of 'sucred' is unknown" FTBFS
Bug-Debian: https://bugs.debian.org/520853

--- a/src/daemon/processconn.c
+++ b/src/daemon/processconn.c
@@ -20,6 +20,7 @@
  *
  ********/
 
+#define _GNU_SOURCE  /* needed for struct ucred */
 #include <sys/socket.h>         /* accept */
 #include <stdlib.h>             /* malloc */
 #include <unistd.h>             /* close */
