diff --git a/src/BreCalClient/EditTimesControl.xaml.cs b/src/BreCalClient/EditTimesControl.xaml.cs
index fa9161b..da0be5e 100644
--- a/src/BreCalClient/EditTimesControl.xaml.cs
+++ b/src/BreCalClient/EditTimesControl.xaml.cs
@@ -182,11 +182,13 @@ namespace BreCalClient
             {
                 this.Times.EtaBerthFixed = true;
                 this.imageFixedOrder.Source = new BitmapImage(new Uri(@"pack://application:,,,/Resources/lock.png", UriKind.RelativeOrAbsolute));
+                this.buttonFixedOrder.ToolTip = BreCalClient.Resources.Resources.textTooltipUnSetFixedOrder;
             }
             else
             {
                 this.Times.EtaBerthFixed = false;
                 this.imageFixedOrder.Source = new BitmapImage(new Uri(@"pack://application:,,,/Resources/lock_open.png", UriKind.RelativeOrAbsolute));
+                this.buttonFixedOrder.ToolTip = BreCalClient.Resources.Resources.textTooltipSetFixedOrder;
             }
         }
 
diff --git a/src/BreCalClient/Resources/Resources.Designer.cs b/src/BreCalClient/Resources/Resources.Designer.cs
index 9505cab..94ed88b 100644
--- a/src/BreCalClient/Resources/Resources.Designer.cs
+++ b/src/BreCalClient/Resources/Resources.Designer.cs
@@ -1061,6 +1061,24 @@ namespace BreCalClient.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Set as a fixed order.
+        /// </summary>
+        public static string textTooltipSetFixedOrder {
+            get {
+                return ResourceManager.GetString("textTooltipSetFixedOrder", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Unset as a a fixed order.
+        /// </summary>
+        public static string textTooltipUnSetFixedOrder {
+            get {
+                return ResourceManager.GetString("textTooltipUnSetFixedOrder", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Tug.
         /// </summary>
diff --git a/src/BreCalClient/Resources/Resources.de.resx b/src/BreCalClient/Resources/Resources.de.resx
index 3235313..7a2cbcf 100644
--- a/src/BreCalClient/Resources/Resources.de.resx
+++ b/src/BreCalClient/Resources/Resources.de.resx
@@ -472,4 +472,10 @@
   <data name="textFixedOrder" xml:space="preserve">
     <value>Als feste Bestellung vermerkt</value>
   </data>
+  <data name="textTooltipSetFixedOrder" xml:space="preserve">
+    <value>Als feste Bestellung vermerken</value>
+  </data>
+  <data name="textTooltipUnSetFixedOrder" xml:space="preserve">
+    <value>Feste Bestellung zurücknehmen</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/BreCalClient/Resources/Resources.resx b/src/BreCalClient/Resources/Resources.resx
index d656f2d..dba2966 100644
--- a/src/BreCalClient/Resources/Resources.resx
+++ b/src/BreCalClient/Resources/Resources.resx
@@ -442,6 +442,12 @@
   <data name="textTo" xml:space="preserve">
     <value>to</value>
   </data>
+  <data name="textTooltipSetFixedOrder" xml:space="preserve">
+    <value>Set as a fixed order</value>
+  </data>
+  <data name="textTooltipUnSetFixedOrder" xml:space="preserve">
+    <value>Unset as a a fixed order</value>
+  </data>
   <data name="textTug" xml:space="preserve">
     <value>Tug</value>
   </data>