diff --git a/arch/sim/src/nuttx-names.dat b/arch/sim/src/nuttx-names.dat
index 5456f27223a..7cfe1bd389e 100644
--- a/arch/sim/src/nuttx-names.dat
+++ b/arch/sim/src/nuttx-names.dat
@@ -41,7 +41,7 @@ statfs         NXstatfs
 system         NXsystem
 tcgetattr      NXtcgetattr
 tcsetattr      NXtcsetattr
-umount         NXumount
+umount2        NXumount2
 unlink         NXunlink
 usleep         NXusleep
 vfork          NXvfork