diff --git a/materials.yml b/materials.yml
index 5adae37..f2d7a1f 100644
--- a/materials.yml
+++ b/materials.yml
@@ -58,7 +58,7 @@
   masterwork: 1
   weight: 0.5
   dex_bonus: 2
-  asf_bonus: 10
+  asf_bonus: -10
   acp_bonus: 3
   category_bonus: 1
   cost: