diff --git a/mach/sun2/libsys/unmount.s b/mach/sun2/libsys/unmount.s
index 27da9a8ed..f323fa5f4 100644
--- a/mach/sun2/libsys/unmount.s
+++ b/mach/sun2/libsys/unmount.s
@@ -1,4 +1,4 @@
 #include "syscall.h"
 .sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
 .define _umount
-_umount: SYSTEM(SYS_unmount)
+_umount: SYSTEM(SYS_umount)