diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c
index 6507fa101effe326ea80ba088a94ad41dd2e4e16..4d0d47c1ffbd463d5327ce8988e27f2502bf4958 100644
--- a/lib/crc-t10dif.c
+++ b/lib/crc-t10dif.c
@@ -20,7 +20,7 @@
 
 static struct crypto_shash __rcu *crct10dif_tfm;
 static struct static_key crct10dif_fallback __read_mostly;
-DEFINE_MUTEX(crc_t10dif_mutex);
+static DEFINE_MUTEX(crc_t10dif_mutex);
 
 static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data)
 {