1 files changed, 1 insertions, 0 deletions
diff --git a/intern.h b/intern.h
index 4cd56eac16..32970ddd81 100644
--- a/intern.h
+++ b/intern.h
@@ -275,6 +275,7 @@ void rb_lastline_set _((VALUE));
 VALUE rb_sym_all_symbols _((void));
 /* process.c */
 int rb_proc_exec _((const char*));
+int rb_waitpid _((int,int*,int));
 void rb_syswait _((int));
 VALUE rb_proc_times _((VALUE));
 /* range.c */