--- a/ipc/glue/IPCMessageUtils.h
+++ b/ipc/glue/IPCMessageUtils.h
@@ -115,17 +115,17 @@ static const uint32_t MAX_MESSAGE_SIZE =
  */
 template <typename E, typename EnumValidator>
 struct EnumSerializer {
   typedef E paramType;
   typedef typename mozilla::UnsignedStdintTypeForSize<sizeof(paramType)>::Type
           uintParamType;
 
   static void Write(Message* aMsg, const paramType& aValue) {
-    MOZ_ASSERT(EnumValidator::IsLegalValue(aValue));
+    MOZ_RELEASE_ASSERT(EnumValidator::IsLegalValue(aValue));
     WriteParam(aMsg, uintParamType(aValue));
   }
 
   static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult) {
     uintParamType value;
     if (!ReadParam(aMsg, aIter, &value)) {
 #ifdef MOZ_CRASHREPORTER
       CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("IPCReadErrorReason"),