diff --git a/tinycrypt/ecc.c b/tinycrypt/ecc.c
index ca91e12..27cef2e 100644
--- a/tinycrypt/ecc.c
+++ b/tinycrypt/ecc.c
@@ -1234,11 +1234,13 @@
 	return uECC_valid_point(_public);
 }
 
-int uECC_compute_public_key(const uint8_t *private_key, uint8_t *public_key)
+int uECC_compute_public_key(const uint8_t * private_key, uint8_t * public_key)
 {
 	int ret = UECC_FAULT_DETECTED;
 	uECC_word_t _private[NUM_ECC_WORDS];
 	uECC_word_t _public[NUM_ECC_WORDS * 2];
+	volatile const uint8_t * private_key_dup = private_key;
+	volatile const uint8_t * public_key_dup = public_key;
 
 	uECC_vli_bytesToNative(
 	_private,
@@ -1264,5 +1266,8 @@
 	uECC_vli_nativeToBytes(
 	public_key +
 	NUM_ECC_BYTES, NUM_ECC_BYTES, _public + NUM_ECC_WORDS);
+	if(private_key_dup != private_key || public_key_dup != public_key){
+	    return UECC_FAULT_DETECTED;
+	}
 	return ret;
 }