diff --git a/data/mods/MindOverMatter/effects/effects_psionic.json b/data/mods/MindOverMatter/effects/effects_psionic.json
index b5f677d785e5e..6f1d1802352e0 100644
--- a/data/mods/MindOverMatter/effects/effects_psionic.json
+++ b/data/mods/MindOverMatter/effects/effects_psionic.json
@@ -1772,7 +1772,7 @@
     "rating": "bad",
     "max_duration": 3000,
     "dur_add_perc": 5,
-    "base_mods": { "speed_mod": [ -40 ] },
+    "enchantments": [ { "values": [ { "value": "SPEED", "multiply": -0.25 } ] } ],
     "immune_flags": [ "DIMENSIONAL_ANCHOR", "TELESTOP", "TELEPORT_IMMUNE" ]
   },
   {