diff --git a/wpiutil/src/main/native/fmtlib/include/fmt/format-inl.h b/wpiutil/src/main/native/fmtlib/include/fmt/format-inl.h
index 2c51c50ae..cc89abdd3 100644
--- a/wpiutil/src/main/native/fmtlib/include/fmt/format-inl.h
+++ b/wpiutil/src/main/native/fmtlib/include/fmt/format-inl.h
@@ -92,8 +92,7 @@ FMT_FUNC void report_error(format_func func, int error_code,
 // A wrapper around fwrite that throws on error.
 inline void fwrite_fully(const void* ptr, size_t size, size_t count,
                          FILE* stream) {
-  size_t written = std::fwrite(ptr, size, count, stream);
-  if (written < count) FMT_THROW(system_error(errno, "cannot write to file"));
+  std::fwrite(ptr, size, count, stream);
 }
 
 #ifndef FMT_STATIC_THOUSANDS_SEPARATOR
diff --git a/wpiutil/src/main/native/fmtlib/include/fmt/xchar.h b/wpiutil/src/main/native/fmtlib/include/fmt/xchar.h
index 55825077f..9acb893fa 100644
--- a/wpiutil/src/main/native/fmtlib/include/fmt/xchar.h
+++ b/wpiutil/src/main/native/fmtlib/include/fmt/xchar.h
@@ -207,8 +207,7 @@ inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
   wmemory_buffer buffer;
   detail::vformat_to(buffer, fmt, args);
   buffer.push_back(L'\0');
-  if (std::fputws(buffer.data(), f) == -1)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+  std::fputws(buffer.data(), f);
 }
 
 inline void vprint(wstring_view fmt, wformat_args args) {
diff --git a/wpiutil/src/main/native/fmtlib/src/os.cpp b/wpiutil/src/main/native/fmtlib/src/os.cpp
index 04b4dc506..4eb3e1fdd 100644
--- a/wpiutil/src/main/native/fmtlib/src/os.cpp
+++ b/wpiutil/src/main/native/fmtlib/src/os.cpp
@@ -277,8 +277,7 @@ std::size_t file::read(void* buffer, std::size_t count) {
 std::size_t file::write(const void* buffer, std::size_t count) {
   rwresult result = 0;
   FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
-  if (result < 0) FMT_THROW(system_error(errno, "cannot write to file"));
-  return detail::to_unsigned(result);
+  return count;
 }
 
 file file::dup(int fd) {