diff --git a/src/MahApps.Metro/Controls/TimePicker/TimePickerBase.cs b/src/MahApps.Metro/Controls/TimePicker/TimePickerBase.cs
index de3f6e2499..3698a3e7a1 100644
--- a/src/MahApps.Metro/Controls/TimePicker/TimePickerBase.cs
+++ b/src/MahApps.Metro/Controls/TimePicker/TimePickerBase.cs
@@ -941,7 +941,7 @@ private static void SetDefaultTimeOfDayValue(Selector? selector, int? defaultInd
             }
         }
 
-        protected TimeSpan? GetSelectedTimeFromGUI()
+        protected virtual TimeSpan? GetSelectedTimeFromGUI()
         {
             if (IsValueSelected(this.hourInput) &&
                 IsValueSelected(this.minuteInput) &&
@@ -1197,4 +1197,4 @@ private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
             }
         }
     }
-}
\ No newline at end of file
+}