diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 0a0123e2..9593ff2c 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -23,8 +23,8 @@ android {
         minSdk = 28
         multiDexEnabled = true
         targetSdk = 35
-        versionCode = 97
-        versionName = "1.15.2"
+        versionCode = 98
+        versionName = "1.15.3"
         base.archivesName = "MedTimer"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
diff --git a/app/src/main/java/com/futsch1/medtimer/medicine/editors/IntervalEditor.kt b/app/src/main/java/com/futsch1/medtimer/medicine/editors/IntervalEditor.kt
index f155d88f..cc76eb39 100644
--- a/app/src/main/java/com/futsch1/medtimer/medicine/editors/IntervalEditor.kt
+++ b/app/src/main/java/com/futsch1/medtimer/medicine/editors/IntervalEditor.kt
@@ -19,7 +19,7 @@ class IntervalEditor(
         intervalUnitToggle.check(intervalUnitToggle.getChildAt(unit.ordinal).id)
         intervalUnitToggle.addOnButtonCheckedListener { _, checkedId, isChecked ->
             val selectedUnit = checkedIntervalUnit(checkedId)
-            if (isChecked) {
+            if (isChecked && timeEdit.text.toString().isNotBlank()) {
                 interval.setValue(timeEdit.text.toString().toInt(), unit)
                 var value = interval.getValue(selectedUnit)
                 if (value == 0) {