diff --git a/src/include/gpxe/errfile.h b/src/include/gpxe/errfile.h
index 744ae5b2..48db1dc1 100644
--- a/src/include/gpxe/errfile.h
+++ b/src/include/gpxe/errfile.h
@@ -116,6 +116,7 @@
 #define ERRFILE_image_cmd	      ( ERRFILE_OTHER | 0x000a0000 )
 #define ERRFILE_uri_test	      ( ERRFILE_OTHER | 0x000b0000 )
 #define ERRFILE_ibft		      ( ERRFILE_OTHER | 0x000c0000 )
+#define ERRFILE_tls		      ( ERRFILE_OTHER | 0x000d0000 )
 
 /** @} */