diff --git a/apps/opencs/model/tools/referenceablecheck.cpp b/apps/opencs/model/tools/referenceablecheck.cpp
index 488081f46f..1816d0808a 100644
--- a/apps/opencs/model/tools/referenceablecheck.cpp
+++ b/apps/opencs/model/tools/referenceablecheck.cpp
@@ -621,12 +621,6 @@ void CSMTools::ReferenceableCheckStage::npcCheck (
     }
     else
     {
-        if (npc.mNpdt52.mMana < 0)
-            messages.push_back (std::make_pair (id, npc.mId + " mana has negative value"));
-
-        if (npc.mNpdt52.mFatigue < 0)
-            messages.push_back (std::make_pair (id, npc.mId + " fatigue has negative value"));
-
         if (npc.mNpdt52.mAgility == 0)
             messages.push_back (std::make_pair (id, npc.mId + " agility has zero value"));