diff --git a/proprietary/cryptoPlugin/WVCryptoPlugin.cpp b/proprietary/cryptoPlugin/WVCryptoPlugin.cpp
index b5098114..2bde312c 100644
--- a/proprietary/cryptoPlugin/WVCryptoPlugin.cpp
+++ b/proprietary/cryptoPlugin/WVCryptoPlugin.cpp
@@ -46,6 +46,8 @@ const uint8_t WVCryptoFactory::kUUIDWidevine[16] = {
 WVCryptoPlugin::WVCryptoPlugin(const void *data, size_t size)
     : mInitCheck(NO_INIT)
 {
+    memset(mEncKey, 0, sizeof(mEncKey));
+
     // not using data at this time, require
     // size to be zero.
     if (size > 0) {