diff --git a/mach/minix/libsys/_exit.c b/mach/minix/libsys/_exit.c
new file mode 100644
index 000000000..32aa51015
--- /dev/null
+++ b/mach/minix/libsys/_exit.c
@@ -0,0 +1,7 @@
+#include "lib.h"
+
+PUBLIC int _exit(status)
+int status;
+{
+  return callm1(MM, EXIT, status, 0, 0, NIL_PTR, NIL_PTR, NIL_PTR);
+}
diff --git a/mach/minixST/libsys/LIST b/mach/minixST/libsys/LIST
index 95cbe89d5..c106422e0 100644
--- a/mach/minixST/libsys/LIST
+++ b/mach/minixST/libsys/LIST
@@ -15,6 +15,7 @@ dup.c
 dup2.c
 exec.c
 exit.c
+_exit.c
 cleanup.c
 fork.c
 fstat.c
diff --git a/mach/minixST/libsys/_exit.c b/mach/minixST/libsys/_exit.c
new file mode 100644
index 000000000..32aa51015
--- /dev/null
+++ b/mach/minixST/libsys/_exit.c
@@ -0,0 +1,7 @@
+#include "lib.h"
+
+PUBLIC int _exit(status)
+int status;
+{
+  return callm1(MM, EXIT, status, 0, 0, NIL_PTR, NIL_PTR, NIL_PTR);
+}