diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index bd8b932e9efe..861356446498 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -212,7 +212,9 @@ static struct syscall decoded_syscalls[] = {
 	{ .name = "linkat", .ret_type = 1, .nargs = 5,
 	  .args = { { Atfd, 0 }, { Name, 1 }, { Atfd, 2 }, { Name, 3 },
 		    { Atflags, 4 } } },
-	{ .name = "lseek", .ret_type = 2, .nargs = 3,
+	{ .name = "listen", .ret_type = 1, .nargs = 2,
+	  .args = { { Int, 0 }, { Int, 1 } } },
+ 	{ .name = "lseek", .ret_type = 2, .nargs = 3,
 	  .args = { { Int, 0 }, { QuadHex, 1 }, { Whence, 2 } } },
 	{ .name = "lstat", .ret_type = 1, .nargs = 2,
 	  .args = { { Name | IN, 0 }, { Stat | OUT, 1 } } },