diff --git a/line.xml b/line.xml
index a0fb5b6e77..333017ecf8 100644
--- a/line.xml
+++ b/line.xml
@@ -85,7 +85,7 @@
                         <field name="employee"/>
                     </x>
                     <y>
-                        <field name="hours"/>
+                        <field name="hours" widget="float_time"/>
                     </y>
                 </graph>
                 ]]>
diff --git a/work_type.xml b/work_type.xml
index ca08db631b..22c630c651 100644
--- a/work_type.xml
+++ b/work_type.xml
@@ -124,7 +124,7 @@
                         <field name="name"/>
                     </x>
                     <y>
-                        <field name="hours"/>
+                        <field name="hours" widget="float_time"/>
                     </y>
                 </graph>
                 ]]>