diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2cc62ca75b2e42ccd04574d4fcd194da90ef31cd..ebde59e61133629104b55fd133c415794172662e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -756,7 +756,8 @@ static struct syscall_fmt {
 	.alias = "old_mmap",
 #endif
 	  .arg = { [2] = { .scnprintf = SCA_MMAP_PROT,	/* prot */ },
-		   [3] = { .scnprintf = SCA_MMAP_FLAGS,	/* flags */ }, }, },
+		   [3] = { .scnprintf = SCA_MMAP_FLAGS,	/* flags */ },
+		   [5] = { .scnprintf = SCA_HEX,	/* offset */ }, }, },
 	{ .name	    = "mount",
 	  .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
 		   [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */