diff --git a/drivers/ata.c b/drivers/ata.c
index 2697a55..8ac576f 100644
--- a/drivers/ata.c
+++ b/drivers/ata.c
@@ -567,8 +567,7 @@ int ATAReadPartition(struct ata_device *dev)
 int ATADetectController(struct ata_controller *controller)
 {
 
-	mutexInit(&controller[0].mutex);
-	mutexInit(&controller[1].mutex);
+	mutexInit(&controller->mutex);
 	controller->devices[0].id      = 0;
 	controller->devices[0].isSlave = 0;
 	controller->devices[0].ctl     = controller;