diff --git a/src/main/java/de/dennisguse/opentracks/settings/SensorsSettingsFragment.java b/src/main/java/de/dennisguse/opentracks/settings/SensorsSettingsFragment.java
index 20fa8cc42..3f39f6377 100644
--- a/src/main/java/de/dennisguse/opentracks/settings/SensorsSettingsFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/settings/SensorsSettingsFragment.java
@@ -52,9 +52,9 @@ public void onDisplayPreferenceDialog(Preference preference) {
     private void setWheelCircumferenceInputFilter() {
         EditTextPreference wheelPreference = findPreference(getString(R.string.settings_sensor_bluetooth_cycling_speed_wheel_circumference_key));
         wheelPreference.setOnPreferenceChangeListener((preference, newValue) -> {
-            if (newValue instanceof String string) {
+            if (newValue instanceof String) {
                 try {
-                    int newValueInt = Integer.parseInt(string);
+                    int newValueInt = Integer.parseInt((String) newValue);
                     return newValueInt >= 100 && newValueInt < 4000;
                 } catch (NumberFormatException e) {
                     Log.w(TAG, "Entered string is no number.");