diff --git a/build/windows/2_build-gimp-msys2.ps1 b/build/windows/2_build-gimp-msys2.ps1
index 34de672451..60f0530e35 100644
--- a/build/windows/2_build-gimp-msys2.ps1
+++ b/build/windows/2_build-gimp-msys2.ps1
@@ -43,7 +43,7 @@ if (-not (Test-Path _build-$(@($env:VCPKG_DEFAULT_TRIPLET,$env:MSYSTEM_PREFIX) |
   {
     #FIXME: There is no GJS for Windows. See: https://gitlab.gnome.org/GNOME/gimp/-/issues/5891
     meson setup _build-$(@($env:VCPKG_DEFAULT_TRIPLET,$env:MSYSTEM_PREFIX) | ?{$_} | select -First 1) -Dprefix="$GIMP_PREFIX" $NON_RELOCATABLE_OPTION `
-                $PKGCONF_RELOCATABLE_OPTION $INSTALLER_OPTION $STORE_OPTION `
+                $PKGCONF_RELOCATABLE_OPTION $WARN_AS_ERROR_ON_CI $INSTALLER_OPTION $STORE_OPTION `
                 -Denable-default-bin=enabled -Dbuild-id='org.gimp.GIMP_official';
     if ("$LASTEXITCODE" -gt '0') { exit 1 }
   }