diff --git a/src/node_i18n.cc b/src/node_i18n.cc
index 9f3ae18dcfe2b4..9e4628f0e3bc06 100644
--- a/src/node_i18n.cc
+++ b/src/node_i18n.cc
@@ -174,7 +174,7 @@ MaybeLocal<Object> TranscodeLatin1ToUcs2(Environment* env,
                                          const char* source,
                                          const size_t source_length,
                                          UErrorCode* status) {
-  MaybeStackBuffer<UChar> destbuf(source_length);
+  MaybeStackBuffer<char16_t> destbuf(source_length);
   auto actual_length =
       simdutf::convert_latin1_to_utf16le(source, source_length, destbuf.out());
   if (actual_length == 0) {
@@ -218,7 +218,7 @@ MaybeLocal<Object> TranscodeUcs2FromUtf8(Environment* env,
                                          UErrorCode* status) {
   size_t expected_utf16_length =
       simdutf::utf16_length_from_utf8(source, source_length);
-  MaybeStackBuffer<UChar> destbuf(expected_utf16_length);
+  MaybeStackBuffer<char16_t> destbuf(expected_utf16_length);
   auto actual_length =
       simdutf::convert_utf8_to_utf16le(source, source_length, destbuf.out());