diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index 3cf24fce7b..95838bfd74 100644
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -929,7 +929,7 @@ bool BufferParams::writeLaTeX(odocstream & os, LaTeXFeatures & features,
 		os << "\\lstset{";
 		// do not test validity because listings_params is supposed to be valid
 		string par = InsetListingsParams(listings_params).separatedParams(true);
-		os << from_ascii(par);
+		os << from_utf8(par);
 		// count the number of newlines
 		for (size_t i = 0; i < par.size(); ++i)
 			if (par[i] == '\n')
diff --git a/src/insets/InsetListings.cpp b/src/insets/InsetListings.cpp
index 3ce9970f10..5765f022f8 100644
--- a/src/insets/InsetListings.cpp
+++ b/src/insets/InsetListings.cpp
@@ -180,7 +180,7 @@ int InsetListings::latex(Buffer const & buf, odocstream & os,
 		if (param_string.empty())
 			os << "\\lstinline" << *delimiter;
 		else
-			os << "\\lstinline[" << from_ascii(param_string) << "]" << *delimiter;
+			os << "\\lstinline[" << from_utf8(param_string) << "]" << *delimiter;
 	} else {
 		OutputParams rp = runparams;
 		rp.local_font = &text_.real_current_font;