diff --git a/src/osd/osdmini/minifile.c b/src/osd/osdmini/minifile.c
index 52ddc3a2503..2883b81c731 100644
--- a/src/osd/osdmini/minifile.c
+++ b/src/osd/osdmini/minifile.c
@@ -101,6 +101,14 @@ file_error osd_write(osd_file *file, const void *buffer, UINT64 offset, UINT32 l
 	return FILERR_NONE;
 }
 
+//============================================================
+//  osd_openpty
+//============================================================
+
+file_error osd_openpty(osd_file **file, char *name, size_t name_len)
+{
+    return FILERR_FAILURE;
+}
 
 //============================================================
 //  osd_truncate
diff --git a/src/osd/sdl/sdlptty_os2.c b/src/osd/sdl/sdlptty_os2.c
index 800b3d9a16b..e7d76965238 100644
--- a/src/osd/sdl/sdlptty_os2.c
+++ b/src/osd/sdl/sdlptty_os2.c
@@ -32,3 +32,8 @@ file_error sdl_close_ptty(osd_file *file)
 {
 	return FILERR_ACCESS_DENIED;
 }
+
+file_error sdl_slave_name_ptty(osd_file *file)
+{
+        return FILERR_ACCESS_DENIED;
+}
diff --git a/src/osd/windows/winfile.c b/src/osd/windows/winfile.c
index 3663a4a7c3e..2ac5cddaee3 100644
--- a/src/osd/windows/winfile.c
+++ b/src/osd/windows/winfile.c
@@ -235,6 +235,14 @@ file_error osd_write(osd_file *file, const void *buffer, UINT64 offset, UINT32 l
 	return FILERR_NONE;
 }
 
+//============================================================
+//  osd_openpty
+//============================================================
+
+file_error osd_openpty(osd_file **file, char *name, size_t name_len)
+{
+    return FILERR_FAILURE;
+}
 
 //============================================================
 //  osd_truncate