Avoid empty option in babelCall

diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index e8f302537c03ca5c5c471ef38053ebe03c31fde8..5930aaf7b9633bfc9493c6f16c45abbdbf725747 100644 (file)
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -3539,7 +3539,7 @@ string BufferParams::babelCall(LaTeXFeatures const & features, string lang_opts,
                lang_opts = getStringFromVector(blangs);
        // The prefs may require the languages to
        // be submitted to babel itself (not the class).
-       if (langoptions || have_mods)
+       if ((langoptions || have_mods) && !lang_opts.empty())
                return "\\usepackage[" + lang_opts + "]{babel}" + os.str();
        return "\\usepackage{babel}" + os.str();
 }