diff --git a/src/common/filename.cpp b/src/common/filename.cpp
index a7abfeed86..12f498a982 100644
--- a/src/common/filename.cpp
+++ b/src/common/filename.cpp
@@ -2143,7 +2143,7 @@ void wxFileName::SplitPath(const wxString& fullpath,
 wxString wxFileName::StripExtension(const wxString& fullpath)
 {
     wxFileName fn(fullpath);
-    fn.SetExt("");
+    fn.SetExt(_T(""));
     return fn.GetFullPath();
 }