diff --git a/libreplan-webapp/src/main/java/org/libreplan/web/planner/allocation/FormBinder.java b/libreplan-webapp/src/main/java/org/libreplan/web/planner/allocation/FormBinder.java
index 54d104fd9..fd2cbe5d9 100644
--- a/libreplan-webapp/src/main/java/org/libreplan/web/planner/allocation/FormBinder.java
+++ b/libreplan-webapp/src/main/java/org/libreplan/web/planner/allocation/FormBinder.java
@@ -761,7 +761,7 @@ public class FormBinder {
             allResourcesPerDay.setValue((BigDecimal) null);
             AllocationRow.unknownResourcesPerDay(rows);
         } else {
-            allResourcesPerDay.setValue(BigDecimal.ZERO);
+            allResourcesPerDay.setValue(BigDecimal.ONE);
             distributeResourcesPerDayToRows();
             allResourcesPerDay.focus();
         }