diff --git a/src/FileNames.cpp b/src/FileNames.cpp
index e4bacbada..cc01d0c9d 100644
--- a/src/FileNames.cpp
+++ b/src/FileNames.cpp
@@ -865,7 +865,7 @@ bool FileNames::IsOnFATFileSystem(const FilePath &path)
 }
 #endif
 
-bool FileNames::FATFilesystemDenied( const FilePath &path, wxFrame *window /* = nullptr */ )
+bool FileNames::FATFilesystemDenied( const FilePath &path, wxWindow *window /* = nullptr */ )
 {
    if (FileNames::IsOnFATFileSystem(path))
    {
diff --git a/src/FileNames.h b/src/FileNames.h
index 44d2ea22c..e7e2a46e2 100644
--- a/src/FileNames.h
+++ b/src/FileNames.h
@@ -21,7 +21,6 @@
 
 class wxFileName;
 class wxFileNameWrapper;
-class wxFrame;
 
 namespace FileNames
 {
@@ -214,7 +213,7 @@ namespace FileNames
 
    AUDACITY_DLL_API
    bool IsOnFATFileSystem(const FilePath &path);
-   bool FATFilesystemDenied(const FilePath &path, wxFrame *window = nullptr);
+   bool FATFilesystemDenied(const FilePath &path, wxWindow *window = nullptr);
 
    AUDACITY_DLL_API
    //! Give enough of the path to identify the device.  (On Windows, drive letter plus ':')