diff --git a/contrib/packaging/hgpackaging/inno.py b/contrib/packaging/hgpackaging/inno.py
--- a/contrib/packaging/hgpackaging/inno.py
+++ b/contrib/packaging/hgpackaging/inno.py
@@ -20,6 +20,7 @@
 )
 from .util import (
     find_vc_runtime_files,
+    normalize_windows_version,
     read_version_py,
 )
 
@@ -156,6 +157,7 @@
         version = read_version_py(source_dir)
 
     args.append('/dVERSION=%s' % version)
+    args.append('/dQUAD_VERSION=%s' % normalize_windows_version(version))
 
     args.append('/Odist')
     args.append(str(inno_build_dir / 'mercurial.iss'))
diff --git a/contrib/packaging/inno/mercurial.iss b/contrib/packaging/inno/mercurial.iss
--- a/contrib/packaging/inno/mercurial.iss
+++ b/contrib/packaging/inno/mercurial.iss
@@ -32,6 +32,7 @@
 VersionInfoDescription=Mercurial distributed SCM (version {#VERSION})
 VersionInfoCopyright=Copyright 2005-2020 Matt Mackall and others
 VersionInfoCompany=Matt Mackall and others
+VersionInfoVersion={#QUAD_VERSION}
 InternalCompressLevel=max
 SolidCompression=true
 SetupIconFile=../mercurial.ico