diff --git a/media/libmedia/ICrypto.cpp b/media/libmedia/ICrypto.cpp
index 1fe6bed..e6bea1f 100644
--- a/media/libmedia/ICrypto.cpp
+++ b/media/libmedia/ICrypto.cpp
@@ -97,6 +97,17 @@
         data.writeInterfaceToken(ICrypto::getInterfaceDescriptor());
         data.writeInt32(secure);
         data.writeInt32(mode);
+
+        static const uint8_t kDummy[16] = { 0 };
+
+        if (key == NULL) {
+            key = kDummy;
+        }
+
+        if (iv == NULL) {
+            iv = kDummy;
+        }
+
         data.write(key, 16);
         data.write(iv, 16);