diff --git a/vl.c b/vl.c
index 7b83c43..dbdec71 100644
--- a/vl.c
+++ b/vl.c
@@ -1197,7 +1197,7 @@
              */
             fputc('\n', stderr);
         } else {
-            fprintf(stderr, " from pid %d\n", shutdown_pid);
+            fprintf(stderr, " from pid " FMT_pid "\n", shutdown_pid);
         }
         shutdown_signal = -1;
     }