diff --git a/display.h b/display.h
index b13a3dfd..58a9341a 100644
--- a/display.h
+++ b/display.h
@@ -26,10 +26,6 @@ void S9xToggleSoundChannel (int);
 bool8 S9xOpenSnapshotFile (const char *, bool8, STREAM *);
 void S9xCloseSnapshotFile (STREAM);
 const char * S9xStringInput (const char *);
-std::string S9xGetDirectory (enum s9x_getdirtype);
-std::string S9xGetFilenameInc (std::string, enum s9x_getdirtype);
-std::string S9xBasename (std::string);
-std::string S9xBasenameNoExt (std::string);
 
 // Routines the port has to implement if it uses command-line