diff --git a/src/api/environment.cc b/src/api/environment.cc
index 1597a6cec51cbf..2ecf4029909c7e 100644
--- a/src/api/environment.cc
+++ b/src/api/environment.cc
@@ -169,7 +169,7 @@ void SetIsolateCreateParams(Isolate::CreateParams* params,
   if (allocator != nullptr)
     params->array_buffer_allocator = allocator;
 
-  double total_memory = uv_get_total_memory();
+  const uint64_t total_memory = uv_get_total_memory();
   if (total_memory > 0) {
     // V8 defaults to 700MB or 1.4GB on 32 and 64 bit platforms respectively.
     // This default is based on browser use-cases. Tell V8 to configure the