diff --git a/kernel/microkernel/include/minik.h b/kernel/microkernel/include/minik.h
index 3f4b26ebbbb..bb00df96270 100644
--- a/kernel/microkernel/include/minik.h
+++ b/kernel/microkernel/include/minik.h
@@ -47,7 +47,7 @@ extern int _k_task_count;
 #ifndef LITE
 extern struct map_struct _k_mem_map_list[];
 #endif
-extern struct mbx_struct K_MbxList[];
+extern struct mbx_struct _k_mbox_list[];
 extern struct mutex_struct K_MutexList[];
 extern struct sem_struct K_SemList[];
 extern struct que_struct K_QueList[];
diff --git a/kernel/microkernel/k_mbox.c b/kernel/microkernel/k_mbox.c
index 65e12d8351f..410c833f889 100644
--- a/kernel/microkernel/k_mbox.c
+++ b/kernel/microkernel/k_mbox.c
@@ -342,7 +342,7 @@ void K_sendreq(struct k_args *Writer)
 
 	Writer->Ctxt.proc = sender;
 
-	MailBox = K_MbxList + OBJ_INDEX(MailBoxId);
+	MailBox = _k_mbox_list + OBJ_INDEX(MailBoxId);
 
 	copypacket(&CopyWriter, Writer);
 
@@ -580,7 +580,7 @@ void K_recvreq(struct k_args *Reader)
 
 	CopyReader->Forw = NULL;
 
-	MailBox = K_MbxList + OBJ_INDEX(MailBoxId);
+	MailBox = _k_mbox_list + OBJ_INDEX(MailBoxId);
 
 	for (CopyWriter = MailBox->Writers, temp = NULL; CopyWriter != NULL;
 	     temp = CopyWriter, CopyWriter = CopyWriter->Forw) {
diff --git a/scripts/sysgen.py b/scripts/sysgen.py
index 869a4f0c1eb..8723ec8f124 100755
--- a/scripts/sysgen.py
+++ b/scripts/sysgen.py
@@ -612,13 +612,13 @@ def kernel_main_c_mailboxes():
     total_mbxs = len(mbx_list)
 
     if (total_mbxs == 0):
-        kernel_main_c_out("\nstruct mbx_struct * K_MbxList = NULL;\n")
+        kernel_main_c_out("\nstruct mbx_struct * _k_mbox_list = NULL;\n")
         return
 
     # mailbox descriptors
 
     kernel_main_c_out("\n" +
-        "struct mbx_struct K_MbxList[%d] =\n" % (total_mbxs) +
+        "struct mbx_struct _k_mbox_list[%d] =\n" % (total_mbxs) +
         "{\n")
     for mbx in mbx_list:
         kernel_main_c_out("    {NULL, NULL, 0},\n")