diff --git a/ORCACDefs/stdlib.h b/ORCACDefs/stdlib.h
index 47957b5..173a4c4 100644
--- a/ORCACDefs/stdlib.h
+++ b/ORCACDefs/stdlib.h
@@ -48,6 +48,7 @@ void           *calloc(size_t, size_t);
 div_t           div(int, int);
 void            exit(int);
 void            _exit(int);
+void            _Exit(int);
 void            free(void *);
 char           *getenv(const char *);
 long            labs(long);