diff --git a/src/main/java/de/dennisguse/opentracks/sensors/BluetoothConnectionManager.java b/src/main/java/de/dennisguse/opentracks/sensors/BluetoothConnectionManager.java
index 61ffd7fae..823d24c66 100644
--- a/src/main/java/de/dennisguse/opentracks/sensors/BluetoothConnectionManager.java
+++ b/src/main/java/de/dennisguse/opentracks/sensors/BluetoothConnectionManager.java
@@ -122,6 +122,7 @@ public abstract class BluetoothConnectionManager<DataType> {
     synchronized void connect(Context context, @NonNull BluetoothDevice device) {
         if (bluetoothGatt != null) {
             Log.w(TAG, "Already connected; ignoring.");
+            return;
         }
 
         Log.d(TAG, "Connecting to: " + device);