diff --git a/riscos/dialog.c b/riscos/dialog.c
index 39e6e0572..80bf3445b 100644
--- a/riscos/dialog.c
+++ b/riscos/dialog.c
@@ -233,7 +233,7 @@ void ro_gui_dialog_click_config_br(wimp_pointer *pointer)
 			break;
 		case ICON_CONFIG_BR_EXPLAIN:
 			bw = create_browser_window(browser_TITLE | browser_TOOLBAR |
-					browser_SCROLL_X_ALWAYS | browser_SCROLL_Y_ALWAYS, 320, 256, NULL);
+					browser_SCROLL_X_ALWAYS | browser_SCROLL_Y_ALWAYS, 320, 256);
 			gui_window_show(bw->window);
 			browser_window_open_location(bw, GESTURES_URL);
 			break;
@@ -296,7 +296,7 @@ void ro_gui_dialog_click_config_th(wimp_pointer *pointer)
 			break;
 		case ICON_CONFIG_TH_GET:
 			bw = create_browser_window(browser_TITLE | browser_TOOLBAR |
-					browser_SCROLL_X_ALWAYS | browser_SCROLL_Y_ALWAYS, 480, 320, NULL);
+					browser_SCROLL_X_ALWAYS | browser_SCROLL_Y_ALWAYS, 480, 320);
 			gui_window_show(bw->window);
 			browser_window_open_location(bw, THEMES_URL);
 			break;