Index: vendor/aes/aes.c
==================================================================
--- vendor/aes/aes.c
+++ vendor/aes/aes.c
@@ -430,10 +430,11 @@
   SubBytes(state);
   ShiftRows(state);
   AddRoundKey(Nr, state, RoundKey);
 }
 
+#if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)
 static void InvCipher(state_t* state,uint8_t* RoundKey)
 {
   uint8_t round = 0;
 
   // Add the First round key to the state before starting the rounds.
@@ -454,11 +455,11 @@
   // The MixColumns function is not here in the last round.
   InvShiftRows(state);
   InvSubBytes(state);
   AddRoundKey(0, state, RoundKey);
 }
-
+#endif // #if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)
 
 /*****************************************************************************/
 /* Public functions:                                                         */
 /*****************************************************************************/
 #if defined(ECB) && (ECB == 1)

Index: vendor/aes/version
==================================================================
--- vendor/aes/version
+++ vendor/aes/version
@@ -1,1 +1,1 @@
-https://github.com/kokke/tiny-AES-c/commit/0677e48a4980cc3695bc0f4dab89bad8708d16ea
+https://github.com/kokke/tiny-AES-c/commit/ce24c0db9d7543787e2571dd316c1225ada865ef