diff --git a/library/pkparse.c b/library/pkparse.c
index fa0570c..f03ace2 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -107,8 +107,7 @@
     if (fread(*buf, 1, *n, f) != *n) {
         fclose(f);
 
-        mbedtls_platform_zeroize(*buf, *n);
-        mbedtls_free(*buf);
+        mbedtls_zeroize_and_free(*buf, *n);
 
         return MBEDTLS_ERR_PK_FILE_IO_ERROR;
     }
@@ -146,8 +145,7 @@
                                    (const unsigned char *) pwd, strlen(pwd), f_rng, p_rng);
     }
 
-    mbedtls_platform_zeroize(buf, n);
-    mbedtls_free(buf);
+    mbedtls_zeroize_and_free(buf, n);
 
     return ret;
 }
@@ -167,8 +165,7 @@
 
     ret = mbedtls_pk_parse_public_key(ctx, buf, n);
 
-    mbedtls_platform_zeroize(buf, n);
-    mbedtls_free(buf);
+    mbedtls_zeroize_and_free(buf, n);
 
     return ret;
 }
@@ -1686,8 +1683,7 @@
         ret = pk_parse_key_pkcs8_encrypted_der(pk, key_copy, keylen,
                                                pwd, pwdlen, f_rng, p_rng);
 
-        mbedtls_platform_zeroize(key_copy, keylen);
-        mbedtls_free(key_copy);
+        mbedtls_zeroize_and_free(key_copy, keylen);
     }
 
     if (ret == 0) {