diff --git a/library/pkcs12.c b/library/pkcs12.c
index 98b8324..16a15cb 100644
--- a/library/pkcs12.c
+++ b/library/pkcs12.c
@@ -36,7 +36,7 @@
 #include "mbedtls/pkcs12.h"
 #include "mbedtls/asn1.h"
 #include "mbedtls/cipher.h"
-#include "mbedtls/utils.h"
+#include "mbedtls/platform_util.h"
 
 #include <string.h>
 
@@ -162,7 +162,7 @@
         goto exit;
 
 exit:
-    mbedtls_zeroize( key, sizeof( key ) );
+    mbedtls_platform_zeroize( key, sizeof( key ) );
     mbedtls_arc4_free( &ctx );
 
     return( ret );
@@ -219,8 +219,8 @@
         ret = MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH;
 
 exit:
-    mbedtls_zeroize( key, sizeof( key ) );
-    mbedtls_zeroize( iv,  sizeof( iv  ) );
+    mbedtls_platform_zeroize( key, sizeof( key ) );
+    mbedtls_platform_zeroize( iv,  sizeof( iv  ) );
     mbedtls_cipher_free( &cipher_ctx );
 
     return( ret );
@@ -348,10 +348,10 @@
     ret = 0;
 
 exit:
-    mbedtls_zeroize( salt_block, sizeof( salt_block ) );
-    mbedtls_zeroize( pwd_block, sizeof( pwd_block ) );
-    mbedtls_zeroize( hash_block, sizeof( hash_block ) );
-    mbedtls_zeroize( hash_output, sizeof( hash_output ) );
+    mbedtls_platform_zeroize( salt_block, sizeof( salt_block ) );
+    mbedtls_platform_zeroize( pwd_block, sizeof( pwd_block ) );
+    mbedtls_platform_zeroize( hash_block, sizeof( hash_block ) );
+    mbedtls_platform_zeroize( hash_output, sizeof( hash_output ) );
 
     mbedtls_md_free( &md_ctx );