diff --git a/src/composite.h b/src/composite.h
index 26cf13d27d4..cdcc9301792 100644
--- a/src/composite.h
+++ b/src/composite.h
@@ -209,7 +209,6 @@ extern void compose_region P_ ((int, int, Lisp_Object, Lisp_Object,
 extern void syms_of_composite P_ ((void));
 extern void compose_text P_ ((int, int, Lisp_Object, Lisp_Object,
 			      Lisp_Object));
-extern void compose_chars_in_text P_ ((int, int, Lisp_Object));
 
 #endif /* not EMACS_COMPOSITE_H */