diff --git a/headers/Mandelbrot.h b/headers/Mandelbrot.h
index 0a510c6..1fb2ae4 100644
--- a/headers/Mandelbrot.h
+++ b/headers/Mandelbrot.h
@@ -16,7 +16,7 @@ private:
 	int iterations = 0;
 	double scale = 1;
 	QVector2D translation;
-	void setShaderValues(QOpenGLShaderProgram&);
+	void setShaderValues(QOpenGLShaderProgram&) const;
 };
 
 
diff --git a/src/Mandelbrot.cpp b/src/Mandelbrot.cpp
index e464844..524beb3 100644
--- a/src/Mandelbrot.cpp
+++ b/src/Mandelbrot.cpp
@@ -13,7 +13,7 @@ void Mandelbrot::draw(GLuint vao, QOpenGLShaderProgram& shader) {
 	glBindVertexArray(0);
 }
 
-void Mandelbrot::setShaderValues(QOpenGLShaderProgram &shader) {
+void Mandelbrot::setShaderValues(QOpenGLShaderProgram &shader) const {
 	shader.setUniformValue("origin", QVector2D(-1, 1));
 	shader.setUniformValue("size", QVector2D(2, 2));
 	shader.setUniformValue("iterationCount", iterations);