Fix missing cipher mode dependencies
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/library/aes.c b/library/aes.c
index 289890d..7d03524 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -1690,7 +1690,8 @@
unsigned char key[32];
unsigned char buf[64];
const unsigned char *aes_tests;
-#if defined(MBEDTLS_CIPHER_MODE_CBC) || defined(MBEDTLS_CIPHER_MODE_CFB)
+#if defined(MBEDTLS_CIPHER_MODE_CBC) || defined(MBEDTLS_CIPHER_MODE_CFB) || \
+ defined(MBEDTLS_CIPHER_MODE_OFB)
unsigned char iv[16];
#endif
#if defined(MBEDTLS_CIPHER_MODE_CBC)