diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c
index 26c67c42985c8e1e7f127d0ae84417f5149abea7..999699d45e1421d777eae8cdb6dc3c4b6a81daf3 100644
--- a/drivers/scsi/mac_esp.c
+++ b/drivers/scsi/mac_esp.c
@@ -587,7 +587,7 @@ static int esp_mac_probe(struct platform_device *dev)
 	esp_chips[dev->id] = NULL;
 	if (esp_chips[!dev->id] == NULL) {
 		spin_unlock(&esp_chips_lock);
-		free_irq(host->irq, esp);
+		free_irq(host->irq, NULL);
 	} else
 		spin_unlock(&esp_chips_lock);
 fail_free_priv: