diff --git a/OpenRA.Game/Graphics/IGraphicsDevice.cs b/OpenRA.Game/Graphics/IGraphicsDevice.cs
index deb7ee4b48..64d46048ca 100644
--- a/OpenRA.Game/Graphics/IGraphicsDevice.cs
+++ b/OpenRA.Game/Graphics/IGraphicsDevice.cs
@@ -89,6 +89,7 @@ namespace OpenRA
 
 	public interface IShader
 	{
+		void SetBool(string name, bool value);
 		void SetVec(string name, float x);
 		void SetVec(string name, float x, float y);
 		void SetVec(string name, float[] vec, int length);
diff --git a/OpenRA.Platforms.Default/Shader.cs b/OpenRA.Platforms.Default/Shader.cs
index 2414aa3604..06e15247fb 100644
--- a/OpenRA.Platforms.Default/Shader.cs
+++ b/OpenRA.Platforms.Default/Shader.cs
@@ -148,6 +148,17 @@ namespace OpenRA.Platforms.Default
 				textures[texUnit] = t;
 		}
 
+		public void SetBool(string name, bool value)
+		{
+			VerifyThreadAffinity();
+			GL.UseProgram(program);
+			ErrorHandler.CheckGlError();
+			var param = GL.GetUniformLocation(program, name);
+			ErrorHandler.CheckGlError();
+			GL.Uniform1(param, value ? 1 : 0);
+			ErrorHandler.CheckGlError();
+		}
+
 		public void SetVec(string name, float x)
 		{
 			VerifyThreadAffinity();
diff --git a/OpenRA.Platforms.Null/NullGraphicsDevice.cs b/OpenRA.Platforms.Null/NullGraphicsDevice.cs
index b6a9174b63..57c3b8d159 100644
--- a/OpenRA.Platforms.Null/NullGraphicsDevice.cs
+++ b/OpenRA.Platforms.Null/NullGraphicsDevice.cs
@@ -63,6 +63,7 @@ namespace OpenRA.Platforms.Null
 
 	public class NullShader : IShader
 	{
+		public void SetBool(string name, bool value) { }
 		public void SetVec(string name, float x) { }
 		public void SetVec(string name, float x, float y) { }
 		public void SetVec(string name, float[] vec, int length) { }