diff --git a/data/json/artifact/legacy_artifact_active.json b/data/json/artifact/legacy_artifact_active.json
index 20b364ae2ff23..9f3739d883e46 100644
--- a/data/json/artifact/legacy_artifact_active.json
+++ b/data/json/artifact/legacy_artifact_active.json
@@ -43,8 +43,8 @@
     "flags": [ "NO_PROJECTILE" ],
     "shape": "blast",
     "base_casting_time": 100,
-    "min_damage": 2,
-    "max_damage": 2,
+    "min_damage": -2,
+    "max_damage": -2,
     "message": "You feel healed."
   },
   {