diff --git a/libc/arch-mips/syscalls/umask.S b/libc/arch-mips/syscalls/umask.S
new file mode 100644
index 0000000..eee911e
--- /dev/null
+++ b/libc/arch-mips/syscalls/umask.S
@@ -0,0 +1,22 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+    .text
+    .globl umask
+    .align 4
+    .ent umask
+
+umask:
+    .set noreorder
+    .cpload $t9
+    li $v0, __NR_umask
+    syscall
+    bnez $a3, 1f
+    move $a0, $v0
+    j $ra
+    nop
+1:
+    la $t9,__set_errno
+    j $t9
+    nop
+    .set reorder
+    .end umask