diff --git a/game/src/ui/widget_ops.c b/game/src/ui/widget_ops.c
index 0e48263..35aac97 100644
--- a/game/src/ui/widget_ops.c
+++ b/game/src/ui/widget_ops.c
@@ -20,7 +20,7 @@ WidgetOpData_new (WidgetOp op, void *ptr, ...)
       data->delta = (float) va_arg (ap, double);
       break;
     case OP_SCROLLABLE_SCROLL:
-      glm_vec2_copy (va_arg (ap, vec2), data->scroll_dir);
+      glm_vec2_copy (va_arg (ap, float *), data->scroll_dir);
       break;
     default:
       break;