diff --git a/changelog.txt b/changelog.txt
index 5f6c984..6bb73fd 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -2,6 +2,7 @@
 Version: 0.11.7
 Date: 2023-01-01
   Changes:
+    - Prod modules enabled for optical fiber
     - SE Space locomotives require MEMS gyro now
   Localization:
     - K2: Better string for silica processing, for ja, from Sakuro
diff --git a/modules.lua b/modules.lua
index 644a1e7..d4019ff 100644
--- a/modules.lua
+++ b/modules.lua
@@ -1,6 +1,6 @@
 local util = require("__bzsilicon__.data-util");
 
-recipes = {"silica", "silicon"}
+recipes = {"silica", "silicon", "optical-fiber"}
 if util.me.more_intermediates() then
   table.insert(recipes, "silicon-wafer")
   table.insert(recipes, "solar-cell")