diff --git a/calendar/templates/default/app.css b/calendar/templates/default/app.css
index 1f5e1bfabc..7e9504c3a6 100644
--- a/calendar/templates/default/app.css
+++ b/calendar/templates/default/app.css
@@ -379,7 +379,7 @@ Hide subsequent headers in week view with non-consolidated owners
 	border-right: 1px solid silver;
 	height: initial;
 	min-height: 2em;
-	
+
 	transition: none;
 	z-index:30;
 	white-space: initial;
@@ -1325,3 +1325,5 @@ input#calendar-edit_location {padding-left: 0;}
 	color: #616161;
 	font-weight: 500;
 }
+
+#calendar-edit .dialogFooterToolbar {min-width: 780px;}
\ No newline at end of file
diff --git a/calendar/templates/pixelegg/app.css b/calendar/templates/pixelegg/app.css
index 77fcc920fc..b65aa139ad 100755
--- a/calendar/templates/pixelegg/app.css
+++ b/calendar/templates/pixelegg/app.css
@@ -1295,6 +1295,7 @@ input#calendar-edit_location {
   color: #616161;
   font-weight: 500;
 }
+#calendar-edit .dialogFooterToolbar {min-width: 780px;}
 /*generell*/
 .egw_fw_content_browser_iframe img[src$="svg"] {
   background-color: #828282 !important;