diff --git a/sys/cddl/dev/fbt/arm/fbt_isa.c b/sys/cddl/dev/fbt/arm/fbt_isa.c
index 96a8249d6ac..83c28b89edc 100644
--- a/sys/cddl/dev/fbt/arm/fbt_isa.c
+++ b/sys/cddl/dev/fbt/arm/fbt_isa.c
@@ -172,7 +172,7 @@ again:
 	fbt->fbtp_name = name;
 	if (retfbt == NULL) {
 		fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
-		    name, FBT_RETURN, 5, fbt);
+		    name, FBT_RETURN, 3, fbt);
 	} else {
 		retfbt->fbtp_next = fbt;
 		fbt->fbtp_id = retfbt->fbtp_id;