diff --git a/dump1090.h b/dump1090.h
index 991f7af..6871d11 100644
--- a/dump1090.h
+++ b/dump1090.h
@@ -52,11 +52,11 @@
 
 // Default version number, if not overriden by the Makefile
 #ifndef MODES_DUMP1090_VERSION
-# define MODES_DUMP1090_VERSION     "v1.13-custom"
+# define MODES_DUMP1090_VERSION     "unknown"
 #endif
 
 #ifndef MODES_DUMP1090_VARIANT
-# define MODES_DUMP1090_VARIANT     "dump1090-mutability"
+# define MODES_DUMP1090_VARIANT     "dump1090-unknown"
 #endif
 
 // ============================= Include files ==========================