diff --git a/sandbox/seccomp/syscall_extra_linux_amd64.go b/sandbox/seccomp/syscall_extra_linux_amd64.go
new file mode 100644
index 0000000..19022f6
--- /dev/null
+++ b/sandbox/seccomp/syscall_extra_linux_amd64.go
@@ -0,0 +1,16 @@
+package seccomp
+
+/*
+#cgo linux pkg-config: --static libseccomp
+
+#include <seccomp.h>
+*/
+import "C"
+
+var syscallNumExtra = map[string]int{
+	"umount": SYS_UMOUNT,
+}
+
+const (
+	SYS_UMOUNT = C.__PNR_umount
+)