diff --git a/disease/smallpox.arc b/disease/smallpox.arc
index 8a398a3e7..bc27d35f1 100644
--- a/disease/smallpox.arc
+++ b/disease/smallpox.arc
@@ -2,7 +2,7 @@ Object smallpox
 name smallpox
 type 158
 invisible 1
-attacktype 1
+attacktype 1048576
 wc 20
 magic -3
 Str -1
diff --git a/disease/typhoid.arc b/disease/typhoid.arc
index 45f8d9410..b05cbf036 100644
--- a/disease/typhoid.arc
+++ b/disease/typhoid.arc
@@ -1,7 +1,7 @@
 Object typhoid
 name typhoid
 type 158
-attacktype 1
+attacktype 1048576
 invisible 1
 wc 10
 magic -1