--- a/net80211/ieee80211_crypto_ccmp.c
+++ b/net80211/ieee80211_crypto_ccmp.c
@@ -115,6 +115,7 @@ ccmp_attach(struct ieee80211vap *vap, st
 /* This function (crypto_alloc_foo might sleep. Therefore:
  * Context: process
  */
+#ifdef CONFIG_CRYPTO
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
 	ctx->cc_tfm = crypto_alloc_tfm("aes", 0);
 #else
@@ -123,7 +124,8 @@ ccmp_attach(struct ieee80211vap *vap, st
 	if (IS_ERR(ctx->cc_tfm))
 		ctx->cc_tfm = NULL;
 #endif
-	
+#endif
+
 	if (ctx->cc_tfm == NULL) {
 		IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO,
 				"%s: unable to load kernel AES crypto support\n",
@@ -138,12 +140,14 @@ ccmp_detach(struct ieee80211_key *k)
 {
 	struct ccmp_ctx *ctx = k->wk_private;
 
+#ifdef CONFIG_CRYPTO
 	if (ctx->cc_tfm != NULL)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
 		crypto_free_tfm(ctx->cc_tfm);
 #else
 		crypto_free_cipher(ctx->cc_tfm);
 #endif
+#endif
 	FREE(ctx, M_DEVBUF);
 
 	_MOD_DEC_USE(THIS_MODULE);
@@ -169,7 +173,9 @@ ccmp_setkey(struct ieee80211_key *k)
 			return 0;
 		}
 
+#ifdef CONFIG_CRYPTO
 		crypto_cipher_setkey(ctx->cc_tfm, k->wk_key, k->wk_keylen);
+#endif
 	}
 
 	return 1;
@@ -324,6 +330,7 @@ xor_block(u8 *b, const u8 *a, size_t len
 static void
 rijndael_encrypt(struct crypto_cipher *tfm, const void *src, void *dst)
 {
+#ifdef CONFIG_CRYPTO
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
 	crypto_cipher_encrypt_one(tfm, dst, src);
 #else
@@ -339,6 +346,7 @@ rijndael_encrypt(struct crypto_cipher *t
 	sg_dst.length = AES_BLOCK_LEN;
 	crypto_cipher_encrypt(tfm, &sg_dst, &sg_src, AES_BLOCK_LEN);
 #endif
+#endif
 }
 
 /*
@@ -475,6 +483,9 @@ ccmp_encrypt(struct ieee80211_key *key, 
 	uint8_t *mic, *pos;
 	u_int space;
 
+	if (ctx->cc_tfm == NULL)
+		return 0;
+
 	ctx->cc_vap->iv_stats.is_crypto_ccmp++;
 
 	skb = skb0;
@@ -589,6 +600,9 @@ ccmp_decrypt(struct ieee80211_key *key, 
 	uint8_t *pos, *mic;
 	u_int space;
 
+	if (ctx->cc_tfm == NULL)
+		return 0;
+
 	ctx->cc_vap->iv_stats.is_crypto_ccmp++;
 
 	skb = skb0;
--- a/Makefile
+++ b/Makefile
@@ -192,11 +192,4 @@ endif
 	    exit 1; \
 	fi
 	
-	@# check crypto support is enabled
-	@if [ -z "$(CONFIG_CRYPTO)" ]; then \
-	    echo "FAILED"; \
-	    echo "Please enable crypto API."; \
-	    exit 1; \
-	fi
-	
 	@echo "ok."
