diff --git a/urogue/daemon.c b/urogue/daemon.c
index 841c55f..e3f2ccb 100644
--- a/urogue/daemon.c
+++ b/urogue/daemon.c
@@ -282,11 +282,18 @@ do_fuses(int now)
         {
             if (--wire->d_time <= 0)
             {
-                fuse_arg arg;
+                if (wire->d_id < 0 || wire->d_id >= FUSE_MAX)
+                    printf("Bad fuse id %d\n", wire->d_id);
+                else if (fuses[wire->d_id].func == NULL)
+                    printf("No action for fuse %d!\n", wire->d_id);
+                else
+                {
+                    fuse_arg arg;
 
-                arg.varg = wire->d_arg;
+                    arg.varg = wire->d_arg;
+                    fuses[wire->d_id].func(&arg);
+                }
                 wire->d_type = EMPTY;
-                fuses[wire->d_id].func(&arg);
                 demoncnt -= 1;
             }
         }