2 files changed, 3 insertions, 1 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 5c5cfd1b86..bbaa5acaa3 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -270,7 +270,7 @@ VALUE rb_class_new_instance(int, VALUE*, VALUE);
 VALUE rb_block_proc(void);
 VALUE rb_f_lambda(void);
 VALUE rb_proc_new(VALUE (*)(ANYARGS/* VALUE yieldarg[, VALUE procarg] */), VALUE);
-VALUE rb_proc_call(VALUE, VALUE);
+VALUE rb_proc_call(VALUE, VALUE, rb_blockptr);
 int rb_proc_arity(VALUE);
 VALUE rb_binding_new(void);
 VALUE rb_obj_method(VALUE, VALUE);
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 99321f1933..d51718023d 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -824,6 +824,8 @@ PRINTF_ARGS(void rb_sys_warning(const char*, ...), 1, 2);
 PRINTF_ARGS(void rb_warn(const char*, ...), 1, 2);
 PRINTF_ARGS(void rb_compile_warn(const char *, int, const char*, ...), 3, 4);
 
+typedef struct rb_block_struct *rb_blockptr;
+
 typedef VALUE rb_block_call_func(VALUE, VALUE, int, VALUE*);
 
 VALUE rb_each(VALUE);