diff --git a/wolfcrypt/src/des3.c b/wolfcrypt/src/des3.c
index 02cc76112..672a8673b 100644
--- a/wolfcrypt/src/des3.c
+++ b/wolfcrypt/src/des3.c
@@ -941,8 +941,7 @@
             XMEMCPY(temp_block, in + offset, DES_BLOCK_SIZE);
 
             /* XOR block with IV for CBC */
-            for (i = 0; i < DES_BLOCK_SIZE; i++)
-                temp_block[i] ^= iv[i];
+            xorbuf(temp_block, iv, DES_BLOCK_SIZE);
 
             ret = wolfSSL_CryptHwMutexLock();
             if(ret != 0) {
@@ -1000,8 +999,7 @@
             wolfSSL_CryptHwMutexUnLock();
 
             /* XOR block with IV for CBC */
-            for (i = 0; i < DES_BLOCK_SIZE; i++)
-                (out + offset)[i] ^= iv[i];
+            xorbuf(out + offset, iv, DES_BLOCK_SIZE);
 
             /* store IV for next block */
             XMEMCPY(iv, temp_block, DES_BLOCK_SIZE);
@@ -1037,8 +1035,7 @@
             XMEMCPY(temp_block, in + offset, DES_BLOCK_SIZE);
 
             /* XOR block with IV for CBC */
-            for (i = 0; i < DES_BLOCK_SIZE; i++)
-                temp_block[i] ^= iv[i];
+            xorbuf(temp_block, iv, DES_BLOCK_SIZE);
 
             ret = wolfSSL_CryptHwMutexLock();
             if(ret != 0) {
@@ -1104,8 +1101,7 @@
             wolfSSL_CryptHwMutexUnLock();
 
             /* XOR block with IV for CBC */
-            for (i = 0; i < DES_BLOCK_SIZE; i++)
-                (out + offset)[i] ^= iv[i];
+            xorbuf(out + offset, iv, DES_BLOCK_SIZE);
 
             /* store IV for next block */
             XMEMCPY(iv, temp_block, DES_BLOCK_SIZE);