diff --git a/Tactical/LOS.cpp b/Tactical/LOS.cpp
index 88d02d5a..09c0ef8b 100644
--- a/Tactical/LOS.cpp
+++ b/Tactical/LOS.cpp
@@ -632,15 +632,16 @@ INT8 GetSightAdjustmentCamouflageOnTerrain( SOLDIERTYPE* pSoldier, const UINT8&
 
 	INT16 scaler = -(ANIM_STAND+1 - ubStance); // stand = 7-6 => 10%, crouch = 7-3 => 66%, prone = 7-1 => 100%;
 
-	UINT8 effectiveness = gGameExternalOptions.ubCamouflageEffectiveness;
-	
-	effectiveness += (UINT8)(pSoldier->GetBackgroundValue(BG_PERC_CAMO));
+	INT16 effectiveness = gGameExternalOptions.ubCamouflageEffectiveness + pSoldier->GetBackgroundValue(BG_PERC_CAMO);
 
 	if (ProfileHasSkillTrait(pSoldier->ubProfile, SURVIVAL_NT))
 	{
 		effectiveness += gSkillTraitValues.ubSVCamoEffectivenessBonus;
 	}
 
+	effectiveness = min(100, effectiveness);
+	effectiveness = max(-100, effectiveness);
+
 	scaler = effectiveness * scaler / 6;
 
 	switch(ubTerrainType) {
@@ -675,9 +676,7 @@ INT8 GetDetailedSightAdjustmentCamouflageOnTerrain( SOLDIERTYPE* pSoldier, const
 	
 	INT16 scaler = -(ANIM_STAND+1 - max(ANIM_PRONE, ubStance - bStanceModifier)); // stand = 7-6 => 10%, crouch = 7-3 => 66%, prone = 7-1 => 100%;
 
-	UINT8 effectiveness = gGameExternalOptions.ubCamouflageEffectiveness;
-	
-	effectiveness += (UINT8)(pSoldier->GetBackgroundValue(BG_PERC_CAMO));
+	INT16 effectiveness = gGameExternalOptions.ubCamouflageEffectiveness + pSoldier->GetBackgroundValue(BG_PERC_CAMO);
 
 	if (ProfileHasSkillTrait(pSoldier->ubProfile, SURVIVAL_NT))
 	{