diff --git a/libwvdrmengine/oemcrypto/renewal/derive_key.cpp b/libwvdrmengine/oemcrypto/renewal/derive_key.cpp
index 8db2afaa..9cde5a92 100644
--- a/libwvdrmengine/oemcrypto/renewal/derive_key.cpp
+++ b/libwvdrmengine/oemcrypto/renewal/derive_key.cpp
@@ -85,7 +85,7 @@ static std::string GetSSLError() {
 static bool DeriveKey(const std::vector<uint8_t>& key,
                       const std::vector<uint8_t>& context,
                       std::vector<uint8_t>* out) {
-  if (key.empty() || context.empty() || out == NULL) {
+  if (key.empty() || context.empty() || out == nullptr) {
     std::cerr << "DeriveKey(): Invalid inputs" << std::endl;
     return false;
   }