diff --git a/system76_nv_hda.c b/system76_nv_hda.c
index 73a8c9f..7c2de34 100644
--- a/system76_nv_hda.c
+++ b/system76_nv_hda.c
@@ -162,6 +162,9 @@ static int __init nv_hda_init(struct device *dev) {
 }
 
 static void __exit nv_hda_exit(void) {
+    if (dis_dev == NULL)
+        return;
+
     dis_dev_get();
 
     nv_hda_off();