diff --git a/include/linux/filter.h b/include/linux/filter.h
index 109d05ccea9a4f2cc6de63871f473378088c4a8f..c2f167db8bd5ccace957e97c49c9a6f048859743 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -372,7 +372,7 @@ struct xdp_rxq_info;
 
 #define BPF_LDST_BYTES(insn)					\
 	({							\
-		const int __size = bpf_size_to_bytes(BPF_SIZE(insn->code)); \
+		const int __size = bpf_size_to_bytes(BPF_SIZE((insn)->code)); \
 		WARN_ON(__size < 0);				\
 		__size;						\
 	})