diff --git a/libguile/throw.h b/libguile/throw.h
index 4df81d863..3f41495bd 100644
--- a/libguile/throw.h
+++ b/libguile/throw.h
@@ -48,7 +48,7 @@
 
 
 
-extern SCM scm_catch_apply SCM_P ((SCM tag, SCM proc, SCM a1, SCM args, SCM handler, int lazyp));
+extern SCM scm_catch_apply SCM_P ((SCM tag, SCM proc, SCM a1, SCM args, SCM handler));
 extern SCM scm_catch SCM_P ((SCM tag, SCM thunk, SCM handler));
 extern SCM scm_lazy_catch SCM_P ((SCM tag, SCM thunk, SCM handler));
 extern SCM scm_ithrow SCM_P ((SCM key, SCM args, int noreturn));