diff --git a/wolfcrypt/src/port/maxim/max3266x.c b/wolfcrypt/src/port/maxim/max3266x.c
index 5370337cf9..62954917b5 100644
--- a/wolfcrypt/src/port/maxim/max3266x.c
+++ b/wolfcrypt/src/port/maxim/max3266x.c
@@ -25,10 +25,7 @@
 
 #include <wolfssl/wolfcrypt/settings.h>
 
-#warning "Inside max3266x.c"
 #if defined(WOLFSSL_MAX32665) ||  defined(WOLFSSL_MAX32666)
-#warning "Inside max3266x.c define"
-
 
 #ifdef NO_INLINE
     #include <wolfssl/wolfcrypt/misc.h>
@@ -91,10 +88,14 @@ int wc_MXC_TPU_Init(void)
 int wc_MXC_TPU_Shutdown(void)
 {
     /* Shutdown the TPU device */
-    if(MXC_TPU_Shutdown(MXC_SYS_PERIPH_CLOCK_TRNG) != EXIT_SUCCESS){
-        WOLFSSL_MSG("Device did not shutdown");
-        return RNG_FAILURE_E;
-    }
+    #if defined(WOLFSSL_MAX32665_OLD) || defined(WOLFSSL_MAX32666_OLD)
+        MXC_TPU_Shutdown(); /* Is a void return in older SDK */
+    #else
+        if(MXC_TPU_Shutdown(MXC_SYS_PERIPH_CLOCK_TRNG) != EXIT_SUCCESS){
+            WOLFSSL_MSG("Device did not shutdown");
+            return RNG_FAILURE_E;
+        }
+    #endif
     return EXIT_SUCCESS;
 }
 
diff --git a/wolfssl/wolfcrypt/port/maxim/max3266x.h b/wolfssl/wolfcrypt/port/maxim/max3266x.h
index 9d64d9e3da..2cb6d98bb8 100644
--- a/wolfssl/wolfcrypt/port/maxim/max3266x.h
+++ b/wolfssl/wolfcrypt/port/maxim/max3266x.h
@@ -42,7 +42,7 @@
 #if defined(WOLFSSL_MAX32665) || defined(WOLFSSL_MAX32666)
 
     #if defined(WOLFSSL_MAX32665_OLD) ||  defined(WOLFSSL_MAX32666_OLD)
-        #if !defined(MAX3266X_RTC)
+        #if defined(MAX3266X_RTC)
             #error Cannot use RTC Code with older sdk
         #endif
     #endif
@@ -58,11 +58,13 @@
     #define MAX3266X_MATH
 #endif
 
+#if defined(WOLFSSL_MAX32665_OLD) || defined(WOLFSSL_MAX32666_OLD)
 
-
-
-#if defined(WOLFSSL_MAX32665_OLD) || (WOLFSSL_MAX32666_OLD)
     /* Support for older SDK Maxim provides */
+    #define TARGET MAX32665
+    #define TARGET_REV 0x4131
+    #include "mxc_sys.h"
+
     #if defined(MAX3266X_RNG)
         #include "trng.h"   /* Provides TRNG Drivers */
     #endif
@@ -74,10 +76,6 @@
         #define MXC_TPU_CIPHER_AES192    TPU_CIPHER_AES192
         #define MXC_TPU_CIPHER_AES256    TPU_CIPHER_AES256
 
-        #define MXC_AES_KEY_128_LEN      MXC_AES_KEY_128_LEN
-        #define MXC_AES_KEY_192_LEN      MXC_AES_KEY_192_LEN
-        #define MXC_AES_KEY_256_LEN      MXC_AES_KEY_256_LEN
-
         #define MXC_TPU_MODE_TYPE        tpu_modesel_t
         #define MXC_TPU_MODE_ECB         TPU_MODE_ECB
         #define MXC_TPU_MODE_CBC         TPU_MODE_CBC
@@ -86,8 +84,8 @@
 
         /* AES Functions */
         #define MXC_TPU_Cipher_Config       TPU_Cipher_Config
-        #define MXC_TPU_Cipher_AES_Encrypt  TPU_Cipher_AES_Encrypt
-        #define MXC_TPU_Cipher_AES_Decrypt  TPU_Cipher_AES_Decrypt
+        #define MXC_TPU_Cipher_AES_Encrypt  TPU_AES_Encrypt
+        #define MXC_TPU_Cipher_AES_Decrypt  TPU_AES_Decrypt
 
     #endif
     #if defined(MAX3266X_SHA)
@@ -109,7 +107,7 @@
         #include "maa.h"    /* Provides Drivers for math acceleration for   */
                             /* ECDSA and RSA Acceleration                   */
         /* MAA Defines */
-        #define MXC_TPU_MAA_TYPE     mxc_tpu_maa_clcsel_t
+        #define MXC_TPU_MAA_TYPE     tpu_maa_clcsel_t
         #define WC_MXC_TPU_MAA_EXP      0b0000
         #define WC_MXC_TPU_MAA_SQ       0b0010
         #define WC_MXC_TPU_MAA_MUL      0b0100
@@ -127,11 +125,11 @@
 
     /* TPU Functions */
     #define MXC_TPU_Init                SYS_TPU_Init
-    #define MXC_TPU_Shutdown            SYS_TPU_Shutdown
+    #define MXC_TPU_Shutdown            TPU_Shutdown
     #define MXC_SYS_PERIPH_CLOCK_TPU    SYS_PERIPH_CLOCK_TPU
 
-    #define MXC_SYS_PERIPH_CLOCK_TPU    MXC_SYS_PERIPH_CLOCK_TPU
-    #define MXC_SYS_PERIPH_CLOCK_TRNG   MXC_SYS_PERIPH_CLOCK_TRNG
+    #define MXC_SYS_PERIPH_CLOCK_TPU    SYS_PERIPH_CLOCK_TPU
+    #define MXC_SYS_PERIPH_CLOCK_TRNG   SYS_PERIPH_CLOCK_TRNG
 
     #define MXC_TRNG                    MXC_TRNG
 
@@ -184,12 +182,6 @@ i       #error Not Implemented with old SDK
     #define MXC_SECS_PER_DAY (24 * MXC_SECS_PER_HR)
 #endif
 
-#include "mxc_errors.h" /* ERROR Codes */
-#include "mxc_device.h"
-#include "board.h"
-#include "max32665.h"
-
-
 /* Variable Definitions */
 
 #ifdef __cplusplus
@@ -278,4 +270,4 @@ i       #error Not Implemented with old SDK
 #endif
 
 #endif /* WOLFSSL_MAX32665 || WOLFSSL_MAX32666 */
-#endif /* _WOLFPORT_MAX3266X_H_ */
+#endif /* _WOLFPORT_MAX3266X_H_ */
\ No newline at end of file