diff --git a/reactos/drivers/storage/ide/atapi/atapi.c b/reactos/drivers/storage/ide/atapi/atapi.c
index 4e7287025ea..3ef862e49fd 100644
--- a/reactos/drivers/storage/ide/atapi/atapi.c
+++ b/reactos/drivers/storage/ide/atapi/atapi.c
@@ -5388,7 +5388,7 @@ Return Value:
         //
 
         if ((Srb->Lun != 0) ||
-            (!deviceExtension->DeviceFlags[Srb->TargetId] & DFLAGS_DEVICE_PRESENT)) {
+            (!(deviceExtension->DeviceFlags[Srb->TargetId] & DFLAGS_DEVICE_PRESENT))) {
 
             //
             // Indicate no device found at this address.