diff --git a/arc_file.c b/arc_file.c
index 209b7d1..e4ccca2 100644
--- a/arc_file.c
+++ b/arc_file.c
@@ -6,7 +6,7 @@
 #include "arc_file.h"
 #include "debug.h"
 
-#define MAX_CONF_SIZE 256
+#define MAX_CONF_SIZE 512
 
 static char mod;
 static char rbfname[9];