diff --git a/libc/arch-x86/syscalls/munlockall.S b/libc/arch-x86/syscalls/munlockall.S
index bf0bfa1..e709b8c 100644
--- a/libc/arch-x86/syscalls/munlockall.S
+++ b/libc/arch-x86/syscalls/munlockall.S
@@ -3,8 +3,16 @@
 #include <private/bionic_asm.h>
 
 ENTRY(munlockall)
+
+    call    __kernel_syscall
+    pushl   %eax
+    .cfi_adjust_cfa_offset 4
+    .cfi_rel_offset eax, 0
+
     movl    $__NR_munlockall, %eax
-    int     $0x80
+    call    *(%esp)
+    addl    $4, %esp
+
     cmpl    $-MAX_ERRNO, %eax
     jb      1f
     negl    %eax