diff --git a/applications/apertif/commissioning/apertif_synthesize_all.sh b/applications/apertif/commissioning/apertif_synthesize_all.sh
index 2dded52482b641163eaf4530b9a560291f53f3b1..b2ec00dced53dab496995612f71e7bf42cb9b1bf 100755
--- a/applications/apertif/commissioning/apertif_synthesize_all.sh
+++ b/applications/apertif/commissioning/apertif_synthesize_all.sh
@@ -151,7 +151,8 @@ if [ "$SYNTHESIS" == "1" ]; then
       echo ">>> Do synthesis: $design" >> $LOG_FILE
       if [ "$DEMO_RUN" == "0" ]; then
         run_qcomp unb1 $design --seed=1,2,3,4,5 --clk=unb1_board_clk200
-        # No automatic run_rbf, do this manualy for seed with best clock speed. Procedure:
+        # No automatic run_rbf, because run_rbf runs on active design directory. Therefore do run_rbf
+        # manualy for seed with best clock speed. Procedure:
         # . rm -rf $design active directory
         # . rm -rf the other $design*MHz_r* that achieve < 200 MHz
         # . cp -rp the $design*MHz_r* directory with the highest clock speed to the $design active directory