diff --git a/libc/src/__support/wchar/character_converter.cpp b/libc/src/__support/wchar/character_converter.cpp
index 0afc2a6f59e64..3cdb8ca83b7f0 100644
--- a/libc/src/__support/wchar/character_converter.cpp
+++ b/libc/src/__support/wchar/character_converter.cpp
@@ -16,7 +16,7 @@
 namespace LIBC_NAMESPACE_DECL {
 namespace internal {
 
-CharacterConverter::CharacterConverter(mbstate_t *mbstate) { state = mbstate; }
+CharacterConverter::CharacterConverter(mbstate *mbstate) { state = mbstate; }
 
 bool CharacterConverter::isComplete() {}
 
diff --git a/libc/src/__support/wchar/character_converter.h b/libc/src/__support/wchar/character_converter.h
index a6bac43805376..d0602d2defe22 100644
--- a/libc/src/__support/wchar/character_converter.h
+++ b/libc/src/__support/wchar/character_converter.h
@@ -19,10 +19,10 @@ namespace internal {
 
 class CharacterConverter {
 private:
-  mbstate_t *state;
+  mbstate *state;
 
 public:
-  CharacterConverter(mbstate_t *mbstate);
+  CharacterConverter(mbstate *mbstate);
 
   bool isComplete();