diff --git a/sys/arm64/arm64/elf32_machdep.c b/sys/arm64/arm64/elf32_machdep.c
index 7cd5327b9f1..5c81c6cdce3 100644
--- a/sys/arm64/arm64/elf32_machdep.c
+++ b/sys/arm64/arm64/elf32_machdep.c
@@ -195,7 +195,7 @@ freebsd32_fetch_syscall_args(struct thread *td)
 	register_t *ap;
 	struct syscall_args *sa;
 	int error, i, nap, narg;
-	unsigned int args[4];
+	unsigned int args[6];
 
 	nap = 4;
 	p = td->td_proc;