diff --git a/CommunityPromotionScreen.XCOM_sln b/CommunityPromotionScreen.XCOM_sln
index 1a1fa3e..25891a3 100644
--- a/CommunityPromotionScreen.XCOM_sln
+++ b/CommunityPromotionScreen.XCOM_sln
@@ -3,15 +3,15 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # XCOM ModBuddy Solution File, Format Version 11.00
 VisualStudioVersion = 12.0.21005.1
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{5DAE07AF-E217-45C1-8DE7-FF99D6011E8A}") = "CommunityPromotionScreen", "CommunityPromotionScreen\CommunityPromotionScreen.x2proj", "{27E16B1C-44A5-4518-BE0A-B4E0A73E3343}"
+Project("{5DAE07AF-E217-45C1-8DE7-FF99D6011E8A}") = "CommunityPromotionScreen", "CommunityPromotionScreen\CommunityPromotionScreen.x2proj", "{7206D3A7-2E8B-4241-8BE4-CBE9AA5DD185}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Default|XCOM 2 = Default|XCOM 2
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{27E16B1C-44A5-4518-BE0A-B4E0A73E3343}.Default|XCOM 2.ActiveCfg = Default|XCOM 2
-		{27E16B1C-44A5-4518-BE0A-B4E0A73E3343}.Default|XCOM 2.Build.0 = Default|XCOM 2
+		{7206D3A7-2E8B-4241-8BE4-CBE9AA5DD185}.Default|XCOM 2.ActiveCfg = Default|XCOM 2
+		{7206D3A7-2E8B-4241-8BE4-CBE9AA5DD185}.Default|XCOM 2.Build.0 = Default|XCOM 2
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/CommunityPromotionScreen/CommunityPromotionScreen.x2proj b/CommunityPromotionScreen/CommunityPromotionScreen.x2proj
index 8908fa9..9677562 100644
--- a/CommunityPromotionScreen/CommunityPromotionScreen.x2proj
+++ b/CommunityPromotionScreen/CommunityPromotionScreen.x2proj
@@ -19,6 +19,9 @@
     <Content Include="Config\XComPromotionUIMod.ini">
       <SubType>Content</SubType>
     </Content>
+    <Content Include="Localization\NewPromotionScreenbyDefault.int">
+      <SubType>Content</SubType>
+    </Content>
     <Content Include="ReadMe.txt" />
     <Content Include="ModPreview.jpg" />
     <Content Include="Config\XComEditor.ini" />
diff --git a/CommunityPromotionScreen/Localization/NewPromotionScreenbyDefault.int b/CommunityPromotionScreen/Localization/NewPromotionScreenbyDefault.int
new file mode 100644
index 0000000..41277f6
--- /dev/null
+++ b/CommunityPromotionScreen/Localization/NewPromotionScreenbyDefault.int
@@ -0,0 +1,2 @@
+[NPSBDP_UIArmory_PromotionHero]
+m_strMutuallyExclusive="Mutually exclusive with:"
\ No newline at end of file
diff --git a/CommunityPromotionScreen/Src/NewPromotionScreenbyDefault/Classes/NPSBDP_UIArmory_PromotionHero.uc b/CommunityPromotionScreen/Src/NewPromotionScreenbyDefault/Classes/NPSBDP_UIArmory_PromotionHero.uc
index c965592..d6ee573 100644
--- a/CommunityPromotionScreen/Src/NewPromotionScreenbyDefault/Classes/NPSBDP_UIArmory_PromotionHero.uc
+++ b/CommunityPromotionScreen/Src/NewPromotionScreenbyDefault/Classes/NPSBDP_UIArmory_PromotionHero.uc
@@ -27,6 +27,8 @@ var int Position, MaxPosition;
 
 var int AdjustXOffset;
 
+var localized string m_strMutuallyExclusive;
+
 simulated function OnInit()
 {
 	super.OnInit();
@@ -637,6 +639,8 @@ function PreviewAbility(int Rank, int Branch)
 	local array<SoldierClassAbilityType> AbilityTree;
 	local string AbilityIcon, AbilityName, AbilityDesc, AbilityHint, AbilityCost, CostLabel, APLabel, PrereqAbilityNames;
 	local name PrereqAbilityName;
+	// Variable for Issue #128
+	local string MutuallyExclusiveNames;
 
 	// NPSBDP Patch
 	Branch += Position;
@@ -687,24 +691,48 @@ function PreviewAbility(int Rank, int Branch)
 			{
 				// Look back to the previous rank and check to see if that ability is a prereq for this one
 				// If so, display a message warning the player that there is a prereq
+				// Start Issue #128
 				foreach AbilityTemplate.PrerequisiteAbilities(PrereqAbilityName)
 				{
-					PreviousAbilityTemplate = AbilityTemplateManager.FindAbilityTemplate(PrereqAbilityName);
-					if (PreviousAbilityTemplate != none && !Unit.HasSoldierAbility(PrereqAbilityName))
+					if (InStr(PrereqAbilityName, class'UIArmory_PromotionHero'.default.MutuallyExclusivePrefix) == 0)
+					{
+						PreviousAbilityTemplate = AbilityTemplateManager.FindAbilityTemplate(
+							name(Mid(PrereqAbilityName, Len(class'UIArmory_PromotionHero'.default.MutuallyExclusivePrefix))));
+						if (PreviousAbilityTemplate != none )
+						{
+							if (MutuallyExclusiveNames != "")
+							{
+								MutuallyExclusiveNames $= ", ";
+							}
+							MutuallyExclusiveNames $= PreviousAbilityTemplate.LocFriendlyName;
+						}
+					}
+					else
 					{
-						if (PrereqAbilityNames != "")
+						PreviousAbilityTemplate = AbilityTemplateManager.FindAbilityTemplate(PrereqAbilityName);
+						if (PreviousAbilityTemplate != none && !Unit.HasSoldierAbility(PrereqAbilityName))
 						{
-							PrereqAbilityNames $= ", ";
+							if (PrereqAbilityNames != "")
+							{
+								PrereqAbilityNames $= ", ";
+							}
+							PrereqAbilityNames $= PreviousAbilityTemplate.LocFriendlyName;
 						}
-						PrereqAbilityNames $= PreviousAbilityTemplate.LocFriendlyName;
 					}
 				}
 				PrereqAbilityNames = class'UIUtilities_Text'.static.FormatCommaSeparatedNouns(PrereqAbilityNames);
+				MutuallyExclusiveNames = class'UIUtilities_Text'.static.FormatCommaSeparatedNouns(MutuallyExclusiveNames);
+
+				if (MutuallyExclusiveNames != "")
+				{
+					AbilityDesc = class'UIUtilities_Text'.static.GetColoredText(m_strMutuallyExclusive @ MutuallyExclusiveNames, eUIState_Warning) $ "\n" $ AbilityDesc;
+				}
 
 				if (PrereqAbilityNames != "")
 				{
 					AbilityDesc = class'UIUtilities_Text'.static.GetColoredText(m_strPrereqAbility @ PrereqAbilityNames, eUIState_Warning) $ "\n" $ AbilityDesc;
 				}
+				// End Issue #128
 			}
 		}
 		else
@@ -1169,4 +1197,4 @@ static function string GetClassSummary(XComGameState_Unit Unit)
 	}
 
 	return Unit.GetSoldierClassTemplate().ClassSummary;
-}
\ No newline at end of file
+}