diff --git a/aegisub/src/audio_provider_ffmpegsource.cpp b/aegisub/src/audio_provider_ffmpegsource.cpp
index 6b871175d..adf8423d2 100644
--- a/aegisub/src/audio_provider_ffmpegsource.cpp
+++ b/aegisub/src/audio_provider_ffmpegsource.cpp
@@ -82,7 +82,7 @@ void FFmpegSourceAudioProvider::LoadAudio(Aegisub::String filename) {
 	// clean up
 	Close();
 
-	wxString FileNameWX = wxFileName(wxString(filename.c_str(), wxConvFile)).GetShortPath();
+	wxString FileNameWX = wxFileName(wxString(filename.wc_str(), wxConvFile)).GetShortPath();
 
 	FFIndexer *Indexer = FFMS_CreateIndexer(FileNameWX.mb_str(wxConvUTF8), FFMSErrMsg, MsgSize);
 	if (Indexer == NULL) {
diff --git a/aegisub/src/video_provider_ffmpegsource.cpp b/aegisub/src/video_provider_ffmpegsource.cpp
index 56bb9beec..c0677f7e3 100644
--- a/aegisub/src/video_provider_ffmpegsource.cpp
+++ b/aegisub/src/video_provider_ffmpegsource.cpp
@@ -100,7 +100,7 @@ void FFmpegSourceVideoProvider::LoadVideo(Aegisub::String filename) {
 	// make sure we don't have anything messy lying around
 	Close();
 
-	wxString FileNameWX = wxFileName(wxString(filename.c_str(), wxConvFile)).GetShortPath(); 
+	wxString FileNameWX = wxFileName(wxString(filename.wc_str(), wxConvFile)).GetShortPath(); 
 
 	FFIndexer *Indexer = FFMS_CreateIndexer(FileNameWX.mb_str(wxConvUTF8), FFMSErrMsg, MsgSize);
 	if (Indexer == NULL) {
diff --git a/aegisub/src/video_provider_yuv4mpeg.cpp b/aegisub/src/video_provider_yuv4mpeg.cpp
index 79af2f648..a45d36c03 100644
--- a/aegisub/src/video_provider_yuv4mpeg.cpp
+++ b/aegisub/src/video_provider_yuv4mpeg.cpp
@@ -85,7 +85,7 @@ YUV4MPEGVideoProvider::~YUV4MPEGVideoProvider() {
 void YUV4MPEGVideoProvider::LoadVideo(const Aegisub::String _filename) {
 	Close();
 
-	wxString filename = wxFileName(wxString(_filename.c_str(), wxConvFile)).GetShortPath();
+	wxString filename = wxFileName(wxString(_filename.wc_str(), wxConvFile)).GetShortPath();
 
 #ifdef WIN32
 	sf = _wfopen(filename.wc_str(), _T("rb"));