diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index ce9f5d07726c..24cf89183e5a 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -148,6 +148,9 @@ static struct syscall decoded_syscalls[] = {
 	  .args = { { Int, 0 } } },
 	{ .name = "compat11.fstat", .ret_type = 1, .nargs = 2,
 	  .args = { { Int, 0 }, { Stat11 | OUT, 1 } } },
+	{ .name = "compat11.fstatat", .ret_type = 1, .nargs = 4,
+	  .args = { { Atfd, 0 }, { Name | IN, 1 }, { Stat11 | OUT, 2 },
+		    { Atflags, 3 } } },
 	{ .name = "compat11.lstat", .ret_type = 1, .nargs = 2,
 	  .args = { { Name | IN, 0 }, { Stat11 | OUT, 1 } } },
 	{ .name = "compat11.stat", .ret_type = 1, .nargs = 2,