--- a/src/yamonenv.c
+++ b/src/yamonenv.c
@@ -12,7 +12,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 
-#define DEFAULT_YAMON_ENV_FILE   "/dev/mtd/3"
+#define DEFAULT_YAMON_ENV_FILE   "/dev/mtd3"
 
 
 // control byte definitions:
