diff --git a/include/Nazara/Renderer/ShaderAst.hpp b/include/Nazara/Renderer/ShaderAst.hpp
index eb556ab55..52ad7eb5d 100644
--- a/include/Nazara/Renderer/ShaderAst.hpp
+++ b/include/Nazara/Renderer/ShaderAst.hpp
@@ -229,7 +229,11 @@ namespace Nz
 		class NAZARA_RENDERER_API Constant : public Expression
 		{
 			public:
+				inline explicit Constant(bool value);
 				inline explicit Constant(float value);
+				inline explicit Constant(const Vector2f& value);
+				inline explicit Constant(const Vector3f& value);
+				inline explicit Constant(const Vector4f& value);
 
 				ExpressionType GetExpressionType() const override;
 				void Register(ShaderWriter& visitor) override;
@@ -239,10 +243,11 @@ namespace Nz
 
 				union
 				{
+					bool bool1;
 					float vec1;
-					Nz::Vector2f vec2;
-					Nz::Vector3f vec3;
-					Nz::Vector4f vec4;
+					Vector2f vec2;
+					Vector3f vec3;
+					Vector4f vec4;
 				} values;
 		};
 	}
diff --git a/include/Nazara/Renderer/ShaderAst.inl b/include/Nazara/Renderer/ShaderAst.inl
index 398956187..a334a1bd1 100644
--- a/include/Nazara/Renderer/ShaderAst.inl
+++ b/include/Nazara/Renderer/ShaderAst.inl
@@ -157,11 +157,35 @@ namespace Nz
 				throw std::runtime_error("Component count doesn't match required component count");
 		}
 
+		inline Constant::Constant(bool value) :
+		exprType(ExpressionType::Boolean)
+		{
+			values.bool1 = value;
+		}
+
 		inline Constant::Constant(float value) :
 		exprType(ExpressionType::Float1)
 		{
 			values.vec1 = value;
 		}
+
+		inline Constant::Constant(const Vector2f& value) :
+		exprType(ExpressionType::Float2)
+		{
+			values.vec2 = value;
+		}
+
+		inline Constant::Constant(const Vector3f& value) :
+		exprType(ExpressionType::Float3)
+		{
+			values.vec3 = value;
+		}
+
+		inline Constant::Constant(const Vector4f& value) :
+		exprType(ExpressionType::Float4)
+		{
+			values.vec4 = value;
+		}
 	}
 }
 
diff --git a/src/Nazara/Renderer/GlslWriter.cpp b/src/Nazara/Renderer/GlslWriter.cpp
index 9edaeeb0d..74ccd7728 100644
--- a/src/Nazara/Renderer/GlslWriter.cpp
+++ b/src/Nazara/Renderer/GlslWriter.cpp
@@ -224,10 +224,28 @@ namespace Nz
 	{
 		switch (node.exprType)
 		{
+			case ShaderAst::ExpressionType::Boolean:
+				Append((node.values.bool1) ? "true" : "false");
+				break;
+
 			case ShaderAst::ExpressionType::Float1:
 				Append(String::Format("%F", node.values.vec1));
 				break;
+
+			case ShaderAst::ExpressionType::Float2:
+				Append(String::Format("vec2(%F, %F)", node.values.vec2.x, node.values.vec2.y));
+				break;
+
+			case ShaderAst::ExpressionType::Float3:
+				Append(String::Format("vec3(%F, %F, %F)", node.values.vec3.x, node.values.vec3.y, node.values.vec3.z));
+				break;
+
+			case ShaderAst::ExpressionType::Float4:
+				Append(String::Format("vec4(%F, %F, %F, %F)", node.values.vec4.x, node.values.vec4.y, node.values.vec4.z, node.values.vec4.w));
+				break;
 		}
+
+		throw std::runtime_error("Unhandled expression type");
 	}
 
 	void GlslWriter::Write(const ShaderAst::ExpressionStatement& node)