diff --git a/src/home/homework-luks.c b/src/home/homework-luks.c
index a2d7c78005..c6b34d28d4 100644
--- a/src/home/homework-luks.c
+++ b/src/home/homework-luks.c
@@ -572,7 +572,7 @@ static int luks_validate(
 
         for (int i = 0; i < n; i++) {
                 blkid_partition pp;
-                sd_id128_t id;
+                sd_id128_t id = SD_ID128_NULL;
                 const char *sid;
 
                 errno = 0;