diff --git a/library/include/mobilisis/payment_opt.h b/library/include/mobilisis/payment_opt.h
index ec16849..1e6bfb5 100644
--- a/library/include/mobilisis/payment_opt.h
+++ b/library/include/mobilisis/payment_opt.h
@@ -28,6 +28,7 @@ public:
         pop_carry_over = -1;
         pop_carry_over_option_id = -1;
         pop_prepaid_option_id = -1;
+        pop_prepay_option_id = -1;
         pop_truncate_last_interpolation_step = false;
         pop_accumulate_prices = false;
         pop_accumulate_durations = false;
@@ -61,7 +62,8 @@ public:
     int pop_carry_over;
     int pop_carry_over_option_id;
     bool pop_truncate_last_interpolation_step;
-    int pop_prepaid_option_id;
+    int pop_prepaid_option_id; // deprecated
+    int pop_prepay_option_id;
     bool pop_carry_over_target;
     int pop_carry_over_time_range_id;
     int pop_carry_over_start_time_range;