diff --git a/src/HTMLRenderer/state.cc b/src/HTMLRenderer/state.cc
index cbf7ea1..c1ac1b4 100644
--- a/src/HTMLRenderer/state.cc
+++ b/src/HTMLRenderer/state.cc
@@ -286,7 +286,8 @@ void HTMLRenderer::check_state_change(GfxState * state)
* For horizontal text, set dy = 0, and try to solve dx
* If dx can be solved, we can simply append a x-offset without creating a new line
*
- * TODO, writing mode, set dx and solve dy
+ * TODO, writing mode, set dx = 0 and solve dy
+ * TODO, try to merge when cur_tx and draw_tx are proportional
*/
bool merged = false;