diff --git a/dom/media/gmp/widevine-adapter/content_decryption_module.h b/dom/media/gmp/widevine-adapter/content_decryption_module.h
--- a/dom/media/gmp/widevine-adapter/content_decryption_module.h
+++ b/dom/media/gmp/widevine-adapter/content_decryption_module.h
@@ -16,10 +16,12 @@
 typedef __int64 int64_t;
 #else
 #include <stdint.h>
 #endif
 
+#include "mozilla/DefineEnum.h"
+
 // The version number must be rolled when the exported functions are updated!
 // If the CDM and the adapter use different versions of these functions, the
 // adapter will fail to load or crash!
 #define CDM_MODULE_VERSION 4
 
@@ -73,19 +75,19 @@
 
 }  // extern "C"
 
 namespace cdm {
 
-enum Status : uint32_t {
-  kSuccess = 0,
+MOZ_DEFINE_ENUM_WITH_BASE_AND_TOSTRING(Status, uint32_t, (
+  kSuccess,
   kNeedMoreData,  // Decoder needs more data to produce a decoded frame/sample.
   kNoKey,         // The required decryption key is not available.
   kInitializationError,    // Initialization error.
   kDecryptError,           // Decryption failed.
   kDecodeError,            // Error decoding audio or video.
   kDeferredInitialization  // Decoder is not ready for initialization.
-};
+));
 CHECK_TYPE(Status, 4, 4);
 
 // Exceptions used by the CDM to reject promises.
 // https://w3c.github.io/encrypted-media/#exceptions
 enum Exception : uint32_t {