diff --git a/src/bbtsub.c b/src/bbtsub.c
index b3087ea..8d64357 100644
--- a/src/bbtsub.c
+++ b/src/bbtsub.c
@@ -2141,6 +2141,7 @@ void tedit_bltchar(LispPTR *args)
 
 #endif
 
+#if defined(REALCURSOR) || defined(SUNDISPLAY)
 #ifndef COLOR
 /* Lisp addr hi-word, lo-word, ... */
 static int old_cursorin(DLword addrhi, DLword addrlo, int x, int w, int h, int y, int backward)
@@ -2207,3 +2208,4 @@ static int old_cursorin(DLword addrhi, DLword addrlo, int x, int w, int h, int y
   } /* COLOR case end */
 }
 #endif /* COLOR */
+#endif /* defined(REALCURSOR) || defined(SUNDISPLAY) */