diff --git a/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/ConnectionStateEvent.java b/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/ConnectionStateEvent.java
index 7131f57..e780790 100644
--- a/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/ConnectionStateEvent.java
+++ b/rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/ConnectionStateEvent.java
@@ -59,6 +59,7 @@ public BluetoothDevice getBluetoothDevice() {
     ConnectionStateEvent that = (ConnectionStateEvent) o;
 
     if (mState != that.mState) return false;
+    if (mPreviousState != that.mPreviousState) return false;
     return !(mBluetoothDevice != null ? !mBluetoothDevice.equals(that.mBluetoothDevice)
         : that.mBluetoothDevice != null);
   }