diff --git a/include/config.h b/include/config.h
index ed8b844c..49d09174 100644
--- a/include/config.h
+++ b/include/config.h
@@ -494,7 +494,7 @@
 /* What is the minimum percentage of ascii characters present to be classifed
    as "is_ascii"? */
 
-#define AFL_TXT_MIN_PERCENT 98
+#define AFL_TXT_MIN_PERCENT 99
 
 /* How often to perform ASCII mutations 0 = disable, 1-8 are good values */