diff --git a/os/nil/src/ch.c b/os/nil/src/ch.c
index 35df8b6ef..9eb07690a 100644
--- a/os/nil/src/ch.c
+++ b/os/nil/src/ch.c
@@ -276,7 +276,7 @@ void chSysInit(void) {
   const thread_descriptor_t *tdp;
 
   /* Optional library modules.*/
-  _oslib_init();
+  __oslib_init();
 
   /* Architecture layer initialization.*/
   port_init();