diff --git a/Outputs/CRT/Internals/Shaders/OutputShader.cpp b/Outputs/CRT/Internals/Shaders/OutputShader.cpp
index b382f0d5d..ae77e0853 100644
--- a/Outputs/CRT/Internals/Shaders/OutputShader.cpp
+++ b/Outputs/CRT/Internals/Shaders/OutputShader.cpp
@@ -76,7 +76,7 @@ std::unique_ptr<OutputShader> OutputShader::make_shader(const char *fragment_met
 		"{"
 			"fragColour = vec4(%s, 0.6*cos(lateralVarying));"
 		"}",
-	sampler_type, fragment_methods, output_colour);
+	sampler_type, fragment_methods, colour_expression);
 
 	std::unique_ptr<OutputShader> result = std::unique_ptr<OutputShader>(new OutputShader(vertex_shader, fragment_shader, bindings));
 	free(vertex_shader);