diff --git a/.github/actions/setup-strawberry-perl/action.yml b/.github/actions/setup-strawberry-perl/action.yml
index f3fd6c3550..6bbb548d0f 100644
--- a/.github/actions/setup-strawberry-perl/action.yml
+++ b/.github/actions/setup-strawberry-perl/action.yml
@@ -56,6 +56,7 @@ runs:
         perl C:\Strawberry\perl\bin\cpanm --notest ^
           Authen::NTLM ^
           Date::Manip ^
+          DateTime ^
           Email::Send::SMTP::Gmail ^
           HTTP::ProxyPAC ^
           IO::Socket::SSL ^
diff --git a/.github/scripts/windows/pp-modules.txt b/.github/scripts/windows/pp-modules.txt
index 55b1db8453..cca7aa82a6 100644
--- a/.github/scripts/windows/pp-modules.txt
+++ b/.github/scripts/windows/pp-modules.txt
@@ -15,6 +15,7 @@ Tie::RefHash::Weak
 Win32::Job
 XML::LibXML::SAX
 Safe
+Specio::PP
 apps::backup::backupexec::local::plugin
 apps::backup::backupexec::local::mode::alerts
 apps::backup::backupexec::local::mode::disks
diff --git a/.github/workflows/packaging-plugins-windows.yml b/.github/workflows/packaging-plugins-windows.yml
index 6696e3b4a3..a4657d846f 100644
--- a/.github/workflows/packaging-plugins-windows.yml
+++ b/.github/workflows/packaging-plugins-windows.yml
@@ -106,6 +106,17 @@ jobs:
           }
           Write-Host "Standalone version smoke-test OK."
 
+          # The WSUS synchronization mode uses DateTime, whose Specio
+          # implementation is selected dynamically. Ensure the pure-Perl
+          # implementation is embedded and the mode can load without Perl on PATH.
+          $wsus = & $exe --plugin apps::microsoft::wsus::local::plugin --mode synchronisation-status --help 2>&1 | Out-String
+          Write-Host $wsus
+          if ($wsus -match 'Cannot load module' -or $wsus -notmatch 'critical-last-synchronisation-status') {
+            Write-Error "WSUS synchronization mode failed to load from the standalone executable."
+            exit 1
+          }
+          Write-Host "WSUS synchronization mode smoke-test OK."
+
           # Exercise each HTTP backend with a real request so its native XS stack is
           # loaded (lwp -> Net::SSLeay/OpenSSL; curl -> Net::Curl/libcurl, loaded
           # lazily only on an actual curl request). The target port is dead, so the
diff --git a/src/apps/microsoft/wsus/local/mode/synchronisationstatus.pm b/src/apps/microsoft/wsus/local/mode/synchronisationstatus.pm
index 60f1010dc8..be1f25ebb6 100644
--- a/src/apps/microsoft/wsus/local/mode/synchronisationstatus.pm
+++ b/src/apps/microsoft/wsus/local/mode/synchronisationstatus.pm
@@ -20,6 +20,12 @@
 
 package apps::microsoft::wsus::local::mode::synchronisationstatus;
 
+# Specio's XS implementation is loaded dynamically and is not reliably
+# detected by PAR::Packer. Force its bundled pure-Perl implementation on Windows.
+BEGIN {
+    $ENV{SPECIO_IMPLEMENTATION} = 'PP' if $^O eq 'MSWin32';
+}
+
 use base qw(centreon::plugins::templates::counter);
 
 use strict;