diff --git a/data/mods/Magiclysm/harvest.json b/data/mods/Magiclysm/harvest.json
index 8fbf3889a6124..9844cfaffa3c4 100644
--- a/data/mods/Magiclysm/harvest.json
+++ b/data/mods/Magiclysm/harvest.json
@@ -177,7 +177,7 @@
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
       { "drop": "bone_demihuman", "type": "bone", "mass_ratio": 0.1 },
       { "drop": "demihuman_marrow", "type": "bone", "mass_ratio": 0.005 },
-      { "drop": "sinew", "type": "bone", "mass_ratio": 0.001 },
+      { "drop": "sinew", "type": "bone", "mass_ratio": 0.00035 },
       { "drop": "raw_demihumanleather", "type": "skin", "mass_ratio": 0.02 }
     ]
   },