diff --git a/aegisub/src/subtitle_format_transtation.cpp b/aegisub/src/subtitle_format_transtation.cpp
index 235ef149c..ae1fe7f9f 100644
--- a/aegisub/src/subtitle_format_transtation.cpp
+++ b/aegisub/src/subtitle_format_transtation.cpp
@@ -59,6 +59,10 @@ wxArrayString TranStationSubtitleFormat::GetWriteWildcards() const {
 	return formats;
 }
 
+bool TranStationSubtitleFormat::CanWriteFile(wxString const& filename) const {
+	return filename.Lower().EndsWith(".transtation.txt");
+}
+
 void TranStationSubtitleFormat::WriteFile(const AssFile *src, wxString const& filename, wxString const& encoding) const {
 	FractionalTime ft = AskForFPS(true);
 	if (!ft.FPS().IsLoaded()) return;
diff --git a/aegisub/src/subtitle_format_transtation.h b/aegisub/src/subtitle_format_transtation.h
index c253d3395..039bf2b1f 100644
--- a/aegisub/src/subtitle_format_transtation.h
+++ b/aegisub/src/subtitle_format_transtation.h
@@ -48,6 +48,7 @@ class TranStationSubtitleFormat : public SubtitleFormat {
 
 public:
 	TranStationSubtitleFormat();
+	bool CanWriteFile(wxString const& filename) const;
 	wxArrayString GetWriteWildcards() const;
 	void WriteFile(const AssFile *src, wxString const& filename, wxString const& encoding) const;
 };