diff --git a/arch/sim/src/nuttx-names.dat b/arch/sim/src/nuttx-names.dat
index e8415966a8..3f3f08402d 100644
--- a/arch/sim/src/nuttx-names.dat
+++ b/arch/sim/src/nuttx-names.dat
@@ -53,6 +53,7 @@ memcpy         NXmemcpy
 memset         NXmemset
 mkfifo         NXmkfifo
 mktime         NXmktime
+mmap           NXmmap
 mq_close       NXmq_close
 mkdir          NXmkdir
 mount          NXmount
@@ -62,6 +63,7 @@ optarg         NXoptarg
 optind         NXoptind
 optopt         NXoptopt
 nanosleep      NXnanosleep
+perror         NXperror
 pipe           NXpipe
 poll           NXpoll
 printf         NXprintf