diff --git a/src/rendering/twn_gl_15_rendering.c b/src/rendering/twn_gl_15_rendering.c
index 157c0c6..72de360 100644
--- a/src/rendering/twn_gl_15_rendering.c
+++ b/src/rendering/twn_gl_15_rendering.c
@@ -552,9 +552,9 @@ void finally_draw_command(DeferredCommandDraw command) {
 void render_line(const LinePrimitive *line) {
     finally_use_2d_pipeline();
     glBegin(GL_LINES);
-        glColor4b(line->color.r, line->color.g, line->color.b, line->color.a);
+        glColor4ub(line->color.r, line->color.g, line->color.b, line->color.a);
         glVertex2f(line->start.x, line->start.y);
-        glColor4b(line->color.r, line->color.g, line->color.b, line->color.a);
+        glColor4ub(line->color.r, line->color.g, line->color.b, line->color.a);
         glVertex2f(line->finish.x, line->finish.y);
     glEnd();
 }