Git for Windows installer is still 32-bit as of v2.55.0.5

[StephanTLavavej]

Existing issues matching what you're seeing

• I was not able to find an open or closed issue matching what I'm seeing

Git for Windows version

C:\Temp>git --version --build-options
git version 2.55.0.windows.5
cpu: x86_64
built from commit: 32c4f7689275d233577576630e1ac5b7eb354eb0
sizeof-long: 4
sizeof-size_t: 8
shell-path: D:/git-sdk-64-build-installers/usr/bin/sh
rust: disabled
feature: fsmonitor--daemon
gettext: enabled
libcurl: 8.21.0
OpenSSL: OpenSSL 3.5.7 9 Jun 2026
zlib: 1.3.2
SHA-1: SHA1_DC
SHA-256: SHA256_BLK
default-ref-format: files
default-hash: sha1

Windows version

Windows 11

Windows CPU architecture

x86_64 (64-bit)

Additional Windows version information

Microsoft Windows [Version 10.0.26200.9168]

Options set during installation

C:\Temp>type "C:\Program Files\Git\etc\install-options.txt"
Editor Option: VIM
Custom Editor Path:
Default Branch Option:
Path Option: Cmd
SSH Option: OpenSSH
Tortoise Option: false
CURL Option: OpenSSL
CRLF Option: CRLFCommitAsIs
Bash Terminal Option: MinTTY
Git Pull Behavior Option: Merge
Use Credential Manager: Enabled
Performance Tweaks FSCache: Enabled
Enable Symlinks: Disabled
Enable FSMonitor: Disabled

Other interesting things

The Git for Windows v2.55.0.windows.5 release said:

Git for Windows' installer is now a 64-bit executable (x64 instead of 86).

Did this fix actually take effect? I observe in Task Manager, and directly via dumpbin, that the installer is still 32-bit. (Below, hello64.exe and hello32.exe are Hello World executables I built to verify that dumpbin /headers can detect the difference.)

C:\Temp>dumpbin /headers hello64.exe | rg machine
            8664 machine (x64)

C:\Temp>dumpbin /headers hello32.exe | rg machine
             14C machine (x86)
                   32 bit word machine

C:\Temp>dumpbin /headers Git-2.55.0.5-64-bit.exe | rg machine
             14C machine (x86)
                   32 bit word machine

C:\Temp>coreutils sha256sum Git-2.55.0.5-64-bit.exe
d065a4e23c3d9a6b5073d609b5be0830227ec3ca053c083ba385061ddfaf94c6 *Git-2.55.0.5-64-bit.exe

Terminal/shell

Windows Terminal, Command Prompt

Commands that trigger the issue

Run the Git installer and look at it in Task Manager. Or inspect it via `dumpbin /headers`.

Expected behaviour

I expected the installer to be 64-bit, per the Changelog.

Actual behaviour

The installer is 32-bit. Screenshot:

Repository

No response

[dennisameling]

Observed the same on my arm64 device:

Inno Setup still builds 32-bit installers by default, see the release notes for 7.0.0-beta:

Building 32-bit installers is the default in both editions. Set new [Setup] section directive SetupArchitecture to x64 to build a 64-bit x64 installer instead of a 32-bit x86 installer. This also changes the default values of ArchitecturesAllowed and ArchitecturesInstallIn64BitMode to x64compatible, making 64-bit installers default to 64-bit install mode.

[dennisameling]

Here's a fix, ready for review: git-for-windows/build-extra#732