diff --git a/lib/utils_blkid.c b/lib/utils_blkid.c
index 147a2659..7521be83 100644
--- a/lib/utils_blkid.c
+++ b/lib/utils_blkid.c
@@ -335,9 +335,9 @@ int blk_supported(void)
 
 unsigned blk_get_block_size(struct blkid_handle *h)
 {
-	const char *data;
 	unsigned block_size = 0;
 #ifdef HAVE_BLKID
+	const char *data;
 	if (!blk_is_superblock(h) || !blkid_probe_has_value(h->pr, "BLOCK_SIZE") ||
 	    blkid_probe_lookup_value(h->pr, "BLOCK_SIZE", &data, NULL) ||
 	    sscanf(data, "%u", &block_size) != 1)