diff --git a/src/Nazara/Shader/Ast/AstOptimizer.cpp b/src/Nazara/Shader/Ast/AstOptimizer.cpp
index 03ef7a492..289a7904b 100644
--- a/src/Nazara/Shader/Ast/AstOptimizer.cpp
+++ b/src/Nazara/Shader/Ast/AstOptimizer.cpp
@@ -1014,7 +1014,7 @@ namespace Nz::ShaderAst
 	{
 		std::unique_ptr<ConstantValueExpression> optimized;
 
-		using CCType = CastConstantPropagation<Vector3<TargetType>, TargetType, TargetType, TargetType, TargetType>;
+		using CCType = CastConstantPropagation<Vector4<TargetType>, TargetType, TargetType, TargetType, TargetType>;
 
 		if constexpr (is_complete_v<CCType>)
 		{