diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index 869615a6f2..07a62e97a2 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -1647,7 +1647,7 @@ void Unit::CalcAbsorbResist(Unit *pVictim, SpellSchoolMask schoolMask, DamageEff
         float discreteResistProbability[11];
         for (int i = 0; i < 11; i++)
         {
-            discreteResistProbability[i] = 0.5f - 2.5f * abs(0.1f * i - averageResist);
+            discreteResistProbability[i] = 0.5f - 2.5f * fabs(0.1f * i - averageResist);
             if (discreteResistProbability[i] < 0.0f)
             {
                 discreteResistProbability[i] = 0.0f;