diff --git a/contrib/embeddable-wg-library/wireguard.c b/contrib/embeddable-wg-library/wireguard.c
index 560d7ab..c052355 100644
--- a/contrib/embeddable-wg-library/wireguard.c
+++ b/contrib/embeddable-wg-library/wireguard.c
@@ -1514,7 +1514,7 @@ void wg_free_device(wg_device *dev)
 	free(dev);
 }
 
-static void encode_base64(char dest[4], const uint8_t src[3])
+static void encode_base64(char dest[static 4], const uint8_t src[static 3])
 {
 	const uint8_t input[] = { (src[0] >> 2) & 63, ((src[0] << 4) | (src[1] >> 4)) & 63, ((src[1] << 2) | (src[2] >> 6)) & 63, src[2] & 63 };
 	unsigned int i;
@@ -1539,7 +1539,7 @@ void wg_key_to_base64(wg_key_b64_string base64, const wg_key key)
 	base64[sizeof(wg_key_b64_string) - 1] = '\0';
 }
 
-static int decode_base64(const char src[4])
+static int decode_base64(const char src[static 4])
 {
 	int val = 0;
 	unsigned int i;
diff --git a/contrib/keygen-html/src/curve25519_generate.c b/contrib/keygen-html/src/curve25519_generate.c
index fc47575..3b560a5 100644
--- a/contrib/keygen-html/src/curve25519_generate.c
+++ b/contrib/keygen-html/src/curve25519_generate.c
@@ -72,7 +72,7 @@ EMSCRIPTEN_KEEPALIVE void curve25519_generate_private(u8 private[static 32])
 	normalize_secret(private);
 }
 
-static inline void encode_base64(char dest[4], const u8 src[3])
+static inline void encode_base64(char dest[static 4], const u8 src[static 3])
 {
 	const u8 input[] = { (src[0] >> 2) & 63, ((src[0] << 4) | (src[1] >> 4)) & 63, ((src[1] << 2) | (src[2] >> 6)) & 63, src[2] & 63 };
 
diff --git a/src/encoding.c b/src/encoding.c
index a9ed694..2e2d915 100644
--- a/src/encoding.c
+++ b/src/encoding.c
@@ -8,7 +8,7 @@
 #include <string.h>
 #include "encoding.h"
 
-static inline void encode_base64(char dest[4], const uint8_t src[3])
+static inline void encode_base64(char dest[static 4], const uint8_t src[static 3])
 {
 	const uint8_t input[] = { (src[0] >> 2) & 63, ((src[0] << 4) | (src[1] >> 4)) & 63, ((src[1] << 2) | (src[2] >> 6)) & 63, src[2] & 63 };
 
@@ -32,7 +32,7 @@ void key_to_base64(char base64[static WG_KEY_LEN_BASE64], const uint8_t key[stat
 	base64[WG_KEY_LEN_BASE64 - 1] = '\0';
 }
 
-static inline int decode_base64(const char src[4])
+static inline int decode_base64(const char src[static 4])
 {
 	int val = 0;