diff --git a/reactos/drivers/input/kbdclass/kbdclass.c b/reactos/drivers/input/kbdclass/kbdclass.c
index 0b84940a286..8a7897fc507 100644
--- a/reactos/drivers/input/kbdclass/kbdclass.c
+++ b/reactos/drivers/input/kbdclass/kbdclass.c
@@ -797,10 +797,10 @@ ClassStartIo(
 
 		/* Go to next packet and complete this request */
 		Irp->IoStatus.Status = Status;
-		IoCompleteRequest(Irp, IO_KEYBOARD_INCREMENT);
-
-		IoStartNextPacket(DeviceObject, FALSE);
 		KeReleaseSpinLock(&DeviceExtension->SpinLock, oldIrql);
+
+		IoCompleteRequest(Irp, IO_KEYBOARD_INCREMENT);
+		IoStartNextPacket(DeviceObject, FALSE);
 	}
 	else
 	{
diff --git a/reactos/drivers/input/mouclass/mouclass.c b/reactos/drivers/input/mouclass/mouclass.c
index a49074b651a..9e39b986b40 100644
--- a/reactos/drivers/input/mouclass/mouclass.c
+++ b/reactos/drivers/input/mouclass/mouclass.c
@@ -773,10 +773,10 @@ ClassStartIo(
 
 		/* Go to next packet and complete this request */
 		Irp->IoStatus.Status = Status;
-		IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
-
-		IoStartNextPacket(DeviceObject, FALSE);
 		KeReleaseSpinLock(&DeviceExtension->SpinLock, oldIrql);
+
+		IoCompleteRequest(Irp, IO_MOUSE_INCREMENT);
+		IoStartNextPacket(DeviceObject, FALSE);
 	}
 	else
 	{