diff --git a/net/wireguard/compat/compat.h b/net/wireguard/compat/compat.h
index 8e47d4c4a296..cf5b3fe915d0 100644
--- a/net/wireguard/compat/compat.h
+++ b/net/wireguard/compat/compat.h
@@ -664,23 +664,6 @@ static inline void *skb_put_data(struct sk_buff *skb, const void *data, unsigned
 #endif
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
-static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
-{
-	while (words--) {
-		__le32_to_cpus(buf);
-		buf++;
-	}
-}
-static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
-{
-	while (words--) {
-		__cpu_to_le32s(buf);
-		buf++;
-	}
-}
-#endif
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
 #include <crypto/algapi.h>
 static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,