diff --git a/src/home/homework-luks.c b/src/home/homework-luks.c
index 3ee16fe815..5e6d782fdb 100644
--- a/src/home/homework-luks.c
+++ b/src/home/homework-luks.c
@@ -666,6 +666,7 @@ static int luks_validate(
                 int fd,
                 const char *label,
                 sd_id128_t partition_uuid,
+                uint64_t sector_size,
                 sd_id128_t *ret_partition_uuid,
                 uint64_t *ret_offset,
                 uint64_t *ret_size) {
@@ -683,6 +684,7 @@ static int luks_validate(
         assert(label);
         assert(ret_offset);
         assert(ret_size);
+        assert(sector_size > 0);
 
         r = dlopen_libblkid();
         if (r < 0)
@@ -697,6 +699,12 @@ static int luks_validate(
         if (r != 0)
                 return errno_or_else(ENOMEM);
 
+        /* Set probing sector size if explicitly specified */
+        if (sector_size != UINT32_MAX) {
+                r = sym_blkid_probe_set_sectorsize(b, sector_size);
+                if (r != 0)
+                        return errno_or_else(EINVAL);
+        }
         (void) sym_blkid_probe_enable_superblocks(b, 1);
         (void) sym_blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE);
         (void) sym_blkid_probe_enable_partitions(b, 1);
@@ -778,6 +786,7 @@ static int luks_validate(
         if ((uint64_t) size > UINT64_MAX / 512U)
                 return -EINVAL;
 
+        /* libblkid returns partitions sizes in count of 512-sectors. This does not necessarily need to match the device sector size */
         *ret_offset = offset * 512U;
         *ret_size = size * 512U;
         *ret_partition_uuid = found_partition_uuid;
@@ -1401,7 +1410,15 @@ int home_setup_luks(
                 if (!subdir)
                         return log_oom();
 
-                r = luks_validate(setup->image_fd, user_record_user_name_and_realm(h), h->partition_uuid, &found_partition_uuid, &offset, &size);
+                r = luks_validate(
+                                setup->image_fd,
+                                user_record_user_name_and_realm(h),
+                                h->partition_uuid,
+                                /* if sector size is not specified, select UINT32_MAX, i.e. auto-probe */
+                                h->luks_sector_size == UINT64_MAX ? UINT32_MAX : user_record_luks_sector_size(h),
+                                &found_partition_uuid,
+                                &offset,
+                                &size);
                 if (r < 0)
                         return log_error_errno(r, "Failed to validate disk label: %m");