diff --git a/project.py b/project.py
index c59ceeaa5f..7a87ff6879 100644
--- a/project.py
+++ b/project.py
@@ -39,7 +39,7 @@ class Effort:
         quantities = {}
         for work in works:
             if (work.progress == 1
-                    and work.list_price
+                    and work.invoice_unit_price
                     and not work.invoice_line):
                 if work.price_list_hour:
                     quantity = work.effort_hours
@@ -115,7 +115,7 @@ class Progress:
         for sub_works in grouped_slice(works):
             sub_works = list(sub_works)
             where = reduce_ids(
-                table.id, [x.id for x in sub_works if x.list_price])
+                table.id, [x.id for x in sub_works if x.invoice_unit_price])
             cursor.execute(*table.join(progress,
                     condition=progress.work == table.id
                     ).select(table.id, Sum(progress.progress),
@@ -127,7 +127,7 @@ class Progress:
                 delta = (
                     (work.progress or 0)
                     - invoiced_progress.get(work.id, 0.0))
-                if work.list_price and delta > 0:
+                if work.invoice_unit_price and delta > 0:
                     quantity = delta
                     if work.price_list_hour:
                         quantity *= work.effort_hours
@@ -288,7 +288,7 @@ class Timesheet:
         quantities = {}
         for work in works:
             duration = durations[work.id]
-            if work.list_price:
+            if work.invoice_unit_price:
                 hours = duration.total_seconds() / 60 / 60
                 if work.unit_to_invoice:
                     hours = work.unit_to_invoice.round(hours)