diff --git a/src/hg_connect_http.rs b/src/hg_connect_http.rs
index 530aa1178..57331cda5 100644
--- a/src/hg_connect_http.rs
+++ b/src/hg_connect_http.rs
@@ -43,7 +43,7 @@ use crate::libgit::{
     credential_fill, curl_errorstr, die, get_active_slot, http_auth, http_follow_config,
     run_one_slot, slot_results, ssl_cainfo, HTTP_OK, HTTP_REAUTH,
 };
-use crate::util::{ImmutBString, OsStrExt, PrefixWriter, ReadExt, SeekExt, SliceExt, ToBoxed};
+use crate::util::{ImmutBString, OsStrExt, PrefixWriter, ReadExt, SliceExt, ToBoxed};
 
 mod git_http_state {
     use std::ffi::CString;
@@ -226,7 +226,7 @@ impl HttpRequest {
                     curl_easy_setopt(
                         slot.curl,
                         CURLOPT_POSTFIELDSIZE_LARGE,
-                        body.stream_len_().unwrap(),
+                        body.seek(SeekFrom::End(0)).unwrap(),
                     );
                     /* Ensure we have no state from a previous attempt that failed because
                      * of authentication (401). */
diff --git a/src/hg_connect_stdio.rs b/src/hg_connect_stdio.rs
index 6d8294b48..1c3712264 100644
--- a/src/hg_connect_stdio.rs
+++ b/src/hg_connect_stdio.rs
@@ -23,7 +23,7 @@ use crate::hg_connect::{
 use crate::libc::FdFile;
 use crate::libcinnabar::{hg_connect_stdio, stdio_finish};
 use crate::libgit::child_process;
-use crate::util::{ImmutBString, OsStrExt, PrefixWriter, ReadExt, SeekExt};
+use crate::util::{ImmutBString, OsStrExt, PrefixWriter, ReadExt};
 
 pub struct HgStdioConnection {
     capabilities: HgCapabilities,
@@ -113,7 +113,7 @@ impl HgWireConnection for HgStdioConnection {
         self.proc_in.write_all(&header).unwrap();
         drop(header);
 
-        let len = input.stream_len_().unwrap();
+        let len = input.metadata().unwrap().len();
         //TODO: chunk in smaller pieces.
         writeln!(self.proc_in, "{}", len).unwrap();
 
diff --git a/src/util.rs b/src/util.rs
index 8dafdced4..4ccd2b793 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use std::ffi::{CStr, CString, OsStr};
-use std::io::{self, LineWriter, Read, Seek, SeekFrom, Write};
+use std::io::{self, LineWriter, Read, Write};
 #[cfg(unix)]
 use std::os::unix::ffi;
 #[cfg(windows)]
@@ -94,17 +94,6 @@ pub trait ReadExt: Read {
 
 impl<T: Read> ReadExt for T {}
 
-pub trait SeekExt: Seek {
-    fn stream_len_(&mut self) -> io::Result<u64> {
-        let old_pos = self.stream_position()?;
-        let len = self.seek(SeekFrom::End(0))?;
-        self.seek(SeekFrom::Start(old_pos))?;
-        Ok(len)
-    }
-}
-
-impl<T: Seek> SeekExt for T {}
-
 pub trait SliceExt<C> {
     fn splitn_exact<const N: usize>(&self, c: C) -> Option<[&Self; N]>;
     fn rsplitn_exact<const N: usize>(&self, c: C) -> Option<[&Self; N]>;