diff --git a/tmcd/ron/watchdog b/tmcd/ron/watchdog
index 8bf3020a14022c5931b8edd87d29d6691653c93f..8c939b0d75b2b44c0fe30246b0b686713e086cb7 100755
--- a/tmcd/ron/watchdog
+++ b/tmcd/ron/watchdog
@@ -43,6 +43,11 @@ my $vndir   = "/var/testbed";
 my $pidfile = "/var/run/emulab-watchdog.pid";
 my $noboot  = 0;
 
+#
+# Forward declarations for prototype checking
+#
+sub bootvnodes();
+
 #
 # Parse command arguments. Once we return from getopts, all that should be
 # left are the required arguments.