diff --git a/net/ieee80211/ieee80211_crypt_ccmp.c b/net/ieee80211/ieee80211_crypt_ccmp.c
index f5f412a..11d1557 100644
--- a/net/ieee80211/ieee80211_crypt_ccmp.c
+++ b/net/ieee80211/ieee80211_crypt_ccmp.c
@@ -59,8 +59,8 @@
 	u8 rx_b0[AES_BLOCK_LEN], rx_b[AES_BLOCK_LEN], rx_a[AES_BLOCK_LEN];
 };
 
-void ieee80211_ccmp_aes_encrypt(struct crypto_tfm *tfm,
-			     const u8 pt[16], u8 ct[16])
+static void ieee80211_ccmp_aes_encrypt(struct crypto_tfm *tfm,
+				       const u8 pt[16], u8 ct[16])
 {
 	struct scatterlist src, dst;