diff --git a/api/js/etemplate/Et2Date/Et2DateDuration.ts b/api/js/etemplate/Et2Date/Et2DateDuration.ts
index 7e58523ddb..afa54fd435 100644
--- a/api/js/etemplate/Et2Date/Et2DateDuration.ts
+++ b/api/js/etemplate/Et2Date/Et2DateDuration.ts
@@ -263,11 +263,17 @@ export class Et2DateDuration extends Et2InputWidget(FormControlMixin(LitElement)
 
 	transformAttributes(attrs)
 	{
-		// Clean formats
-		if(typeof attrs.display_format === 'string')
+		// Clean formats, but avoid things that need to be expanded like $cont[display_format]
+		const check = new RegExp('[\$\@' + Object.keys(Et2DateDuration.time_formats).join('') + ']');
+		for(let attr in ["display_format", "data_format"])
 		{
-			attrs.display_format = attrs.display_format.replace(/[^dhms]/g, '');
+			if(typeof attrs[attrs] === 'string' && !check.test(attrs[attr]))
+			{
+				console.warn("Invalid format for " + attr + "'" + attrs[attr] + "'", this);
+				attrs[attr] = attrs[attr].replace(/[^dhms]/g, '');
+			}
 		}
+
 		super.transformAttributes(attrs);
 	}
 
diff --git a/infolog/inc/class.infolog_ui.inc.php b/infolog/inc/class.infolog_ui.inc.php
index e6623090c2..08b57ba56b 100644
--- a/infolog/inc/class.infolog_ui.inc.php
+++ b/infolog/inc/class.infolog_ui.inc.php
@@ -55,7 +55,7 @@ class infolog_ui
 	 *
 	 * @var string
 	 */
-	var $duration_format = ',';	// comma is necessary!
+	var $duration_format = '';
 
 	var $icons = array(
 		'type' => array(
@@ -1009,7 +1009,7 @@ class infolog_ui
 		$values['action'] = $persist['action'] = $values['nm']['action'] = $action;
 		$values['action_id'] = $persist['action_id'] = $values['nm']['action_id'] = $action_id;
 		$values['action_title'] = $persist['action_title'] = $values['nm']['action_title'] = $action_title;
-		$values['duration_format'] = ','.$this->duration_format;
+		$values['duration_format'] = $this->duration_format;
 		$persist['called_as'] = $called_as;
 		$persist['own_referer'] = $own_referer;
 
diff --git a/infolog/templates/default/index.xet b/infolog/templates/default/index.xet
index 2fea7b8d9c..0dac18f865 100644
--- a/infolog/templates/default/index.xet
+++ b/infolog/templates/default/index.xet
@@ -103,26 +103,33 @@
 					<vbox>
 						<hbox readonly="true">
 							<hbox readonly="true">
-								<date-duration id="${row}[info_used_time]" readonly="true" options="@@duration_format"/>
-								<date-duration id="${row}[info_sum_timesheets]" readonly="true" options="@@duration_format" class="timesheet"/>
-							</hbox>
+                                <date-duration id="${row}[info_used_time]" readonly="true"
+                                               display_format="@@duration_format"/>
+                                <date-duration id="${row}[info_sum_timesheets]" readonly="true"
+                                               display_format="@@duration_format" class="timesheet"/>
+                            </hbox>
 							<description/>
 						</hbox>
-						<date-duration id="${row}[info_planned_time]" readonly="true" options="@@duration_format" span="all" class="infolog_planned"/>
+                        <date-duration id="${row}[info_planned_time]" readonly="true" display_format="@@duration_format"
+                                       span="all" class="infolog_planned"/>
 					</vbox>
 					<vbox>
-						<hbox id="r_used_time">
-							<image label="Times" src="timesheet"/>
-							<date-duration id="${row}[info_used_time]" readonly="true" options="@@duration_format"/>
-							<date-duration id="${row}[info_sum_timesheets]" readonly="true" options="@@duration_format" class="timesheet"/>
-						</hbox>
+                        <hbox id="r_used_time">
+                            <image label="Times" src="timesheet"/>
+                            <date-duration id="${row}[info_used_time]" readonly="true"
+                                           display_format="@@duration_format"/>
+                            <date-duration id="${row}[info_sum_timesheets]" readonly="true"
+                                           display_format="@@duration_format" class="timesheet"/>
+                        </hbox>
 						<hbox id="planified">
 							<image label="planned time" src="k_alarm.png"/>
-							<date-duration id="${row}[info_planned_time]" readonly="true" options="@@duration_format" span="all" class="infolog_planned"/>
+                            <date-duration id="${row}[info_planned_time]" readonly="true"
+                                           display_format="@@duration_format" span="all" class="infolog_planned"/>
 						</hbox>
 						<hbox id="replanified">
 							<image label="Re-planned time" src="agt_reload.png"/>
-							<date-duration id="${row}[info_replanned_time]" readonly="true" options="@@duration_format" span="all" class="replanned"/>
+                            <date-duration id="${row}[info_replanned_time]" readonly="true"
+                                           display_format="@@duration_format" span="all" class="replanned"/>
 						</hbox>
 					</vbox>
 					<vbox>