diff --git a/fluent-package/msi/assets/fluent-gem.bat b/fluent-package/msi/assets/fluent-gem.bat
index 042e8f806..a050e33d9 100644
--- a/fluent-package/msi/assets/fluent-gem.bat
+++ b/fluent-package/msi/assets/fluent-gem.bat
@@ -6,7 +6,7 @@ if "%~nx0" == "td-agent-gem.bat" (
 )
 set "FLUENT_PACKAGE_BINDIR=%FLUENT_PACKAGE_TOPDIR%bin"
 set PATH=%FLUENT_PACKAGE_BINDIR%;%PATH%
-for /f "delims=" %%i in ('^""%FLUENT_PACKAGE_BINDIR%\ruby.exe" -rrbconfig -e "print RbConfig::CONFIG['ruby_version']"^"') do set RUBY_VERSION=%%i
+for /f "usebackq" %%i in (`^""%FLUENT_PACKAGE_BINDIR%\ruby.exe" -rrbconfig -e "print RbConfig::CONFIG['ruby_version']"^"`) do set RUBY_VERSION=%%i
 set "GEM_HOME=%FLUENT_PACKAGE_TOPDIR%lib\ruby\gems\%RUBY_VERSION%"
 set "GEM_PATH=%FLUENT_PACKAGE_TOPDIR%lib\ruby\gems\%RUBY_VERSION%"
 "%FLUENT_PACKAGE_BINDIR%\fluent-gem" %*