diff --git a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
index d1dfbdf..6aae482 100644
--- a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
+++ b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
@@ -510,7 +510,11 @@ namespace WaveshareUARTFingerprintSensor
         public void Wake()
         {
             _sleeping = false;
-            _rstPin.Write(GpioPinValue.High);
+            _rstPin.Write(GpioPinValue.High);
+
+            // Needed after wake to really wake the sensor
+            // Because the first command always fail for whatever reason
+            TryGetUserCount(out var _);
         }
 
         private void OnWake()