diff --git a/aegisub/src/ass_file.cpp b/aegisub/src/ass_file.cpp
index 684bc6679..3ba79f696 100644
--- a/aegisub/src/ass_file.cpp
+++ b/aegisub/src/ass_file.cpp
@@ -211,45 +211,20 @@ wxString AssFile::AutoSave() {
 	return dstpath.GetFullPath();
 }
 
-void AssFile::SaveMemory(std::vector<char> &dst,const wxString encoding) {
-	// Set encoding
-	wxString enc = encoding;
-	if (enc.IsEmpty()) enc = "UTF-8";
-	if (enc != "UTF-8") throw "Memory writer only supports UTF-8 for now.";
-
+void AssFile::SaveMemory(std::vector<char> &dst) {
 	// Check if subs contain at least one style
 	// Add a default style if they don't for compatibility with libass/asa
 	if (GetStyles().Count() == 0)
-		InsertStyle(new AssStyle());
+		InsertStyle(new AssStyle);
 
 	// Prepare vector
 	dst.clear();
 	dst.reserve(0x4000);
 
 	// Write file
-	entryIter cur;
-	unsigned int lineSize = 0;
-	unsigned int targetSize = 0;
-	unsigned int pos = 0;
-	wxCharBuffer buffer;
-	for (cur=Line.begin();cur!=Line.end();cur++) {
-		// Convert
-		wxString temp = (*cur)->GetEntryData() + "\r\n";
-		buffer = temp.mb_str(wxConvUTF8);
-		lineSize = strlen(buffer);
-
-		// Raise capacity if needed
-		targetSize = dst.size() + lineSize;
-		if (dst.capacity() < targetSize) {
-			unsigned int newSize = dst.capacity();
-			while (newSize < targetSize) newSize *= 2;
-			dst.reserve(newSize);
-		}
-
-		// Append line
-		pos = dst.size();
-		dst.resize(targetSize);
-		memcpy(&dst[pos],buffer,lineSize);
+	for (entryIter cur = Line.begin(); cur != Line.end(); ++cur) {
+		wxCharBuffer buffer = ((*cur)->GetEntryData() + "\r\n").utf8_str();
+		copy(buffer.data(), buffer.data() + buffer.length(), back_inserter(dst));
 	}
 }
 
diff --git a/aegisub/src/ass_file.h b/aegisub/src/ass_file.h
index 8de28c43c..dac9c7cbf 100644
--- a/aegisub/src/ass_file.h
+++ b/aegisub/src/ass_file.h
@@ -139,7 +139,7 @@ public:
 
 	/// @brief Save to a memory buffer. Used for subtitle providers which support it
 	/// @param[out] dst Destination vector
-	void SaveMemory(std::vector<char> &dst,const wxString encoding="");
+	void SaveMemory(std::vector<char> &dst);
 	/// Add file name to the MRU list
 	void AddToRecent(wxString file);
 	/// Can the file be saved in its current format?
diff --git a/aegisub/src/subtitles_provider_csri.cpp b/aegisub/src/subtitles_provider_csri.cpp
index 9210dfb57..0a221f0f6 100644
--- a/aegisub/src/subtitles_provider_csri.cpp
+++ b/aegisub/src/subtitles_provider_csri.cpp
@@ -86,7 +86,7 @@ void CSRISubtitlesProvider::LoadSubtitles(AssFile *subs) {
 	// Open from memory
 	if (canOpenMem) {
 		std::vector<char> data;
-		subs->SaveMemory(data,wxSTRING_ENCODING);
+		subs->SaveMemory(data);
 		instance.reset(csri_open_mem(renderer,&data[0],data.size(),NULL), &csri_close);
 	}
 
diff --git a/aegisub/src/subtitles_provider_libass.cpp b/aegisub/src/subtitles_provider_libass.cpp
index 442724548..37711ff4b 100644
--- a/aegisub/src/subtitles_provider_libass.cpp
+++ b/aegisub/src/subtitles_provider_libass.cpp
@@ -161,7 +161,7 @@ LibassSubtitlesProvider::~LibassSubtitlesProvider() {
 void LibassSubtitlesProvider::LoadSubtitles(AssFile *subs) {
 	// Prepare subtitles
 	std::vector<char> data;
-	subs->SaveMemory(data,"UTF-8");
+	subs->SaveMemory(data);
 
 	// Load file
 	if (ass_track) ass_free_track(ass_track);