diff --git a/OpenRA.Game/Sound.cs b/OpenRA.Game/Sound.cs
index 1f4013150b..b72cf437e8 100644
--- a/OpenRA.Game/Sound.cs
+++ b/OpenRA.Game/Sound.cs
@@ -21,7 +21,6 @@
 using System;
 using System.Collections.Generic;
 using OpenRA.FileFormats;
-using OpenRA.Support;
 using OpenRA.Traits;
 using Tao.OpenAl;
 
diff --git a/OpenRA.Game/Traits/Buildable.cs b/OpenRA.Game/Traits/Buildable.cs
index d84862d0ac..fe0f92d223 100755
--- a/OpenRA.Game/Traits/Buildable.cs
+++ b/OpenRA.Game/Traits/Buildable.cs
@@ -30,9 +30,9 @@ namespace OpenRA.Traits
 		public virtual object Create(ActorInitializer init) { return new Valued(); }
 	}
 
-	class BuildableInfo : ValuedInfo
+	public class BuildableInfo : ValuedInfo
 	{
-		public readonly string[] Prerequisites = { };
+		[ActorReference]public readonly string[] Prerequisites = { };
 		[ActorReference] public readonly string[] BuiltAt = { };
 		
 		public readonly string Icon = null;
diff --git a/OpenRA.Game/Traits/LintAttributes.cs b/OpenRA.Game/Traits/LintAttributes.cs
index b0aeac5a92..3ddca8fc3a 100644
--- a/OpenRA.Game/Traits/LintAttributes.cs
+++ b/OpenRA.Game/Traits/LintAttributes.cs
@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 
 namespace OpenRA.Traits
 {
@@ -12,4 +9,7 @@ namespace OpenRA.Traits
 
 	[AttributeUsage(AttributeTargets.Field)]
 	public class WeaponReferenceAttribute : Attribute { }
+
+	[AttributeUsage(AttributeTargets.Field)]
+	public class VoiceReferenceAttribute : Attribute { }
 }
diff --git a/OpenRA.Game/Traits/Selectable.cs b/OpenRA.Game/Traits/Selectable.cs
index 131f32fe85..ae95badc8a 100755
--- a/OpenRA.Game/Traits/Selectable.cs
+++ b/OpenRA.Game/Traits/Selectable.cs
@@ -24,6 +24,7 @@ namespace OpenRA.Traits
 	{
 		public readonly int Priority = 10;
 		public readonly int[] Bounds = null;
+		[VoiceReference]
 		public readonly string Voice = null;
 		public readonly float Radius = 10;
 	}
diff --git a/OpenRA.Game/Traits/SupportPower.cs b/OpenRA.Game/Traits/SupportPower.cs
index de2808a1d6..b20e7c0217 100644
--- a/OpenRA.Game/Traits/SupportPower.cs
+++ b/OpenRA.Game/Traits/SupportPower.cs
@@ -30,6 +30,7 @@ namespace OpenRA.Traits
 		public readonly string Image = null;
 		public readonly string Description = "";
 		public readonly string LongDesc = "";
+		[ActorReference]
 		public readonly string[] Prerequisites = { };
 		public readonly int TechLevel = -1;
 		public readonly bool GivenAuto = true;
diff --git a/OpenRA.Game/Traits/TransformsOnDeploy.cs b/OpenRA.Game/Traits/TransformsOnDeploy.cs
index 85a20016b9..2de9ba5d71 100644
--- a/OpenRA.Game/Traits/TransformsOnDeploy.cs
+++ b/OpenRA.Game/Traits/TransformsOnDeploy.cs
@@ -24,6 +24,7 @@ namespace OpenRA.Traits
 {
 	class TransformsOnDeployInfo : TraitInfo<TransformsOnDeploy>
 	{
+		[ActorReference]
 		public readonly string TransformsInto = null;
 		public readonly int[] Offset = null;
 		public readonly int[] DeployDirections = new int[] {96};
diff --git a/OpenRA.Game/Traits/World/HazardLayer.cs b/OpenRA.Game/Traits/World/HazardLayer.cs
index e00f526aa0..062deaf063 100644
--- a/OpenRA.Game/Traits/World/HazardLayer.cs
+++ b/OpenRA.Game/Traits/World/HazardLayer.cs
@@ -16,11 +16,9 @@
  *  You should have received a copy of the GNU General Public License
  *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
  */
-#endregion
-
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
+#endregion
+
+using System.Collections.Generic;
 using System.Linq;
 using OpenRA.FileFormats;
 
@@ -34,7 +32,6 @@ namespace OpenRA.Traits
 	public class HazardLayer : ITerrainCost
 	{
 		List<Pair<Actor, Hazard>>[,] hazards;
-		Map map;
 
 		public HazardLayer( World world )
 		{
diff --git a/RALint/Program.cs b/RALint/RALint.cs
similarity index 76%
rename from RALint/Program.cs
rename to RALint/RALint.cs
index 02953b8f53..5b4edc0518 100644
--- a/RALint/Program.cs
+++ b/RALint/RALint.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Reflection;
+using System.Linq;
 using OpenRA;
 using OpenRA.FileFormats;
 using OpenRA.GameRules;
@@ -8,7 +9,7 @@ using OpenRA.Traits;
 
 namespace RALint
 {
-	static class Program
+	static class RALint
 	{
 		/* todo: move this into the engine? dpstool, seqed, editor, etc all need it (or something similar) */
 		static void InitializeEngineWithMods(string[] mods)
@@ -32,10 +33,18 @@ namespace RALint
 			++errors;
 		}
 
+		static Dictionary<string, int> ValidPrereqs;
+
 		static int Main(string[] args)
 		{
 			InitializeEngineWithMods(args);
 
+			// all the @something names which actually EXIST.
+			var psuedoPrereqs = Rules.Info.Values.Select(a => a.Traits.GetOrDefault<BuildableInfo>()).Where(b => b != null)
+				.Select(b => b.AlternateName).Where(n => n != null).SelectMany(a => a).Select(a => a.ToLowerInvariant()).Distinct();
+
+			ValidPrereqs = Rules.Info.Keys.Concat(psuedoPrereqs).ToDictionary(a => a, a => 0);
+
 			foreach (var actorInfo in Rules.Info)
 				foreach (var traitInfo in actorInfo.Value.Traits.WithInterface<ITraitInfo>())
 					CheckTrait(actorInfo.Value, traitInfo);
@@ -55,9 +64,11 @@ namespace RALint
 			foreach (var field in actualType.GetFields())
 			{
 				if (field.HasAttribute<ActorReferenceAttribute>())
-					CheckReference(actorInfo, traitInfo, field, Rules.Info, "actor");
+					CheckReference(actorInfo, traitInfo, field, ValidPrereqs, "actor");
 				if (field.HasAttribute<WeaponReferenceAttribute>())
 					CheckReference(actorInfo, traitInfo, field, Rules.Weapons, "weapon");
+				if (field.HasAttribute<VoiceReferenceAttribute>())
+					CheckReference(actorInfo, traitInfo, field, Rules.Voices, "voice");
 			}
 		}
 
diff --git a/RALint/RALint.csproj b/RALint/RALint.csproj
index 4cc79d0a91..28e66e2928 100644
--- a/RALint/RALint.csproj
+++ b/RALint/RALint.csproj
@@ -47,7 +47,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Program.cs" />
+    <Compile Include="RALint.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>