diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index afa1815..a3f7bd6 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1144,6 +1144,7 @@ VALUE rb_eval_string_wrap(const char*, int*);
 VALUE rb_funcall(VALUE, ID, int, ...);
 VALUE rb_funcall2(VALUE, ID, int, const VALUE*);
 VALUE rb_funcall3(VALUE, ID, int, const VALUE*);
+VALUE rb_funcall_passing_block(VALUE, ID, int, const VALUE*);
 int rb_scan_args(int, const VALUE*, const char*, ...);
 VALUE rb_call_super(int, const VALUE*);