diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SettingsActivity.kt
index 279d7f5ac..bfd4631da 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/SettingsActivity.kt
@@ -572,13 +572,13 @@ class SettingsActivity : SimpleActivity() {
     private fun setupDefaultStartTime() {
         updateDefaultStartTimeText()
         settings_default_start_time_holder.setOnClickListener {
-            val currentDefaultTime = if (config.defaultStartTime == -1) -1 else 0
+            val currentDefaultTime = if (config.defaultStartTime == DEFAULT_START_TIME_NEXT_FULL_HOUR) DEFAULT_START_TIME_NEXT_FULL_HOUR else 0
             val items = ArrayList<RadioItem>()
-            items.add(RadioItem(-1, getString(R.string.next_full_hour)))
+            items.add(RadioItem(DEFAULT_START_TIME_NEXT_FULL_HOUR, getString(R.string.next_full_hour)))
             items.add(RadioItem(0, getString(R.string.other_time)))
 
             RadioGroupDialog(this@SettingsActivity, items, currentDefaultTime) {
-                if (it as Int == -1) {
+                if (it as Int == DEFAULT_START_TIME_NEXT_FULL_HOUR) {
                     config.defaultStartTime = it
                     updateDefaultStartTimeText()
                 } else {
@@ -595,7 +595,7 @@ class SettingsActivity : SimpleActivity() {
     }
 
     private fun updateDefaultStartTimeText() {
-        if (config.defaultStartTime == -1) {
+        if (config.defaultStartTime == DEFAULT_START_TIME_NEXT_FULL_HOUR) {
             settings_default_start_time.text = getString(R.string.next_full_hour)
         } else {
             val hours = config.defaultStartTime / 60
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
index a2f1e9723..bb7f963f6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Config.kt
@@ -155,7 +155,7 @@ class Config(context: Context) : BaseConfig(context) {
         set(lastVibrateOnReminder) = prefs.edit().putBoolean(LAST_VIBRATE_ON_REMINDER, lastVibrateOnReminder).apply()
 
     var defaultStartTime: Int
-        get() = prefs.getInt(DEFAULT_START_TIME, -1)
+        get() = prefs.getInt(DEFAULT_START_TIME, DEFAULT_START_TIME_NEXT_FULL_HOUR)
         set(defaultStartTime) = prefs.edit().putInt(DEFAULT_START_TIME, defaultStartTime).apply()
 
     var defaultDuration: Int
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
index c62498e84..1a30e347a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
@@ -34,6 +34,8 @@ const val ITEM_EVENT = 0
 const val ITEM_EVENT_SIMPLE = 1
 const val ITEM_HEADER = 2
 
+const val DEFAULT_START_TIME_NEXT_FULL_HOUR = -1
+
 const val DAY = 86400
 const val WEEK = 604800
 const val MONTH = 2592001    // exact value not taken into account, Joda is used for adding months and years