diff --git a/net/net.c b/net/net.c
index 084269e..f35695b 100644
--- a/net/net.c
+++ b/net/net.c
@@ -174,6 +174,8 @@
 
 /* Boot File name */
 char net_boot_file_name[1024];
+/* Indicates whether the file name was specified on the command line */
+bool net_boot_file_name_explicit;
 /* The actual transferred size of the bootfile (in bytes) */
 u32 net_boot_file_size;
 /* Boot file size in blocks as reported by the DHCP server */