diff --git a/src/author_name_filter.rs b/src/author_name_filter.rs
index dedcab9..0d2e4b1 100644
--- a/src/author_name_filter.rs
+++ b/src/author_name_filter.rs
@@ -1,6 +1,6 @@
 use crate::ext::json::ToJson;
 use crate::gettext;
-use crate::stdext::TryErr;
+use crate::ext::try_err::TryErr;
 use json::JsonValue;
 use regex::Regex;
 use std::cmp::PartialEq;
diff --git a/src/ext/mod.rs b/src/ext/mod.rs
index d9f5e71..3a5957a 100644
--- a/src/ext/mod.rs
+++ b/src/ext/mod.rs
@@ -4,4 +4,5 @@ pub mod flagset;
 pub mod json;
 #[cfg(any(feature = "exif", feature = "avdict", feature = "ugoira"))]
 pub mod rawhandle;
+pub mod try_err;
 pub mod use_or_not;
diff --git a/src/stdext.rs b/src/ext/try_err.rs
similarity index 100%
rename from src/stdext.rs
rename to src/ext/try_err.rs
diff --git a/src/ext/use_or_not.rs b/src/ext/use_or_not.rs
index d604864..61758d7 100644
--- a/src/ext/use_or_not.rs
+++ b/src/ext/use_or_not.rs
@@ -1,7 +1,7 @@
 use crate::ext::json::FromJson;
 use crate::ext::json::ToJson;
 use crate::gettext;
-use crate::stdext::TryErr;
+use crate::ext::try_err::TryErr;
 use std::str::FromStr;
 
 #[derive(Clone, Copy, Debug, PartialEq, PartialOrd)]
diff --git a/src/main.rs b/src/main.rs
index a006a45..b2890ef 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -51,7 +51,6 @@ mod pixiv_web;
 mod retry_interval;
 mod settings;
 mod settings_list;
-mod stdext;
 #[cfg(feature = "ugoira")]
 mod ugoira;
 mod utils;
diff --git a/src/ugoira.rs b/src/ugoira.rs
index 796d4f3..3c24815 100644
--- a/src/ugoira.rs
+++ b/src/ugoira.rs
@@ -6,7 +6,7 @@ use crate::ext::cstr::ToCStrError;
 use crate::ext::json::ToJson;
 use crate::ext::rawhandle::ToRawHandle;
 use crate::gettext;
-use crate::stdext::TryErr;
+use crate::ext::try_err::TryErr;
 use std::convert::AsRef;
 use std::default::Default;
 use std::ffi::CStr;