diff --git a/lib/internal/fs/utils.js b/lib/internal/fs/utils.js
index 3b7754292821f3..322b1519ef2807 100644
--- a/lib/internal/fs/utils.js
+++ b/lib/internal/fs/utils.js
@@ -659,6 +659,8 @@ const validateOffsetLengthWrite = hideStackFrames(
     if (length < 0) {
       throw new ERR_OUT_OF_RANGE('length', '>= 0', length);
     }
+
+    validateInt32(length, 'length', 0);
   }
 );
 
diff --git a/src/node_file.cc b/src/node_file.cc
index b8902f6b348eca..d3bcb8fbd804c7 100644
--- a/src/node_file.cc
+++ b/src/node_file.cc
@@ -1835,8 +1835,8 @@ static void WriteBuffer(const FunctionCallbackInfo<Value>& args) {
   CHECK_LE(static_cast<uint64_t>(off_64), buffer_length);
   const size_t off = static_cast<size_t>(off_64);
 
-  CHECK(IsSafeJsInt(args[3]));
-  const size_t len = static_cast<size_t>(args[3].As<Integer>()->Value());
+  CHECK(args[3]->IsInt32());
+  const size_t len = static_cast<size_t>(args[3].As<Int32>()->Value());
   CHECK(Buffer::IsWithinBounds(off, len, buffer_length));
   CHECK_LE(len, buffer_length);
   CHECK_GE(off + len, off);