diff --git a/ChangeLog b/ChangeLog
index 94ff163880..80df3691b1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Nov  5 16:55:52 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* proc.c (rb_f_lambda): remove deprecated function, which has been
+	  unavailable from extension libraries.
+
 Wed Nov  5 16:26:58 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* include/ruby/intern.h (rb_clear_cache): mark as deprecated, not
diff --git a/proc.c b/proc.c
index a44cc53bca..d5f042fb42 100644
--- a/proc.c
+++ b/proc.c
@@ -670,13 +670,6 @@ rb_block_clear_env_self(VALUE proc)
     return proc;
 }
 
-VALUE
-rb_f_lambda(void)
-{
-    rb_warn("rb_f_lambda() is deprecated; use rb_block_proc() instead");
-    return rb_block_lambda();
-}
-
 /*  Document-method: ===
  *
  *  call-seq: