diff --git a/src/cargo/ops/cargo_package.rs b/src/cargo/ops/cargo_package.rs
index a322afbb3..679883e4f 100644
--- a/src/cargo/ops/cargo_package.rs
+++ b/src/cargo/ops/cargo_package.rs
@@ -239,15 +239,17 @@ fn build_ar_list(
             })?
             .to_string();
         match rel_str.as_ref() {
-            "Cargo.toml" => {
+            "Cargo.toml" |
+            // normalize for case insensitive filesystems (like on Windows)
+            "cargo.toml" => {
                 result.push(ArchiveFile {
                     rel_path: PathBuf::from(ORIGINAL_MANIFEST_FILE),
                     rel_str: ORIGINAL_MANIFEST_FILE.to_string(),
                     contents: FileContents::OnDisk(src_file),
                 });
                 result.push(ArchiveFile {
-                    rel_path,
-                    rel_str,
+                    rel_path: PathBuf::from("Cargo.toml"),
+                    rel_str: "Cargo.toml".to_string(),
                     contents: FileContents::Generated(GeneratedFile::Manifest),
                 });
             }
diff --git a/tests/testsuite/package.rs b/tests/testsuite/package.rs
index 444270236..4d33b2f98 100644
--- a/tests/testsuite/package.rs
+++ b/tests/testsuite/package.rs
@@ -3016,7 +3016,7 @@ See [..]
 [VERIFYING] foo v0.0.1 ([CWD])
 [COMPILING] foo v0.0.1 ([CWD][..])
 [FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
-[PACKAGED] 3 files, [..] ([..] compressed)
+[PACKAGED] 4 files, [..] ([..] compressed)
 ",
         )
         .run();
@@ -3025,7 +3025,8 @@ See [..]
         .with_stdout(
             "\
 Cargo.lock
-cargo.toml
+Cargo.toml
+Cargo.toml.orig
 src/main.rs
 ",
         )
@@ -3036,7 +3037,7 @@ src/main.rs
     validate_crate_contents(
         f,
         "foo-0.0.1.crate",
-        &["Cargo.lock", "cargo.toml", "src/main.rs"],
+        &["Cargo.lock", "Cargo.toml", "Cargo.toml.orig", "src/main.rs"],
         &[],
     );
 }