diff --git a/common/autoboot.c b/common/autoboot.c
index 107fb1533d..832ef7c78c 100644
--- a/common/autoboot.c
+++ b/common/autoboot.c
@@ -27,7 +27,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#define MAX_DELAY_STOP_STR 64
+#define DELAY_STOP_STR_MAX_LENGTH 64
 
 #ifndef DEBUG_BOOTKEYS
 #define DEBUG_BOOTKEYS 0
@@ -69,7 +69,7 @@ static int menukey;
 static int passwd_abort_crypt(uint64_t etime)
 {
 	const char *crypt_env_str = env_get("bootstopkeycrypt");
-	char presskey[MAX_DELAY_STOP_STR];
+	char presskey[DELAY_STOP_STR_MAX_LENGTH];
 	u_int presskey_len = 0;
 	int abort = 0;
 	int err;
@@ -150,9 +150,9 @@ static int passwd_abort_sha256(uint64_t etime)
 	if (sha_env_str == NULL)
 		sha_env_str = CONFIG_AUTOBOOT_STOP_STR_SHA256;
 
-	presskey = malloc_cache_aligned(MAX_DELAY_STOP_STR);
+	presskey = malloc_cache_aligned(DELAY_STOP_STR_MAX_LENGTH);
 	c = strstr(sha_env_str, ":");
-	if (c && (c - sha_env_str < MAX_DELAY_STOP_STR)) {
+	if (c && (c - sha_env_str < DELAY_STOP_STR_MAX_LENGTH)) {
 		/* preload presskey with salt */
 		memcpy(presskey, sha_env_str, c - sha_env_str);
 		presskey_len = c - sha_env_str;
@@ -179,7 +179,7 @@ static int passwd_abort_sha256(uint64_t etime)
 	do {
 		if (tstc()) {
 			/* Check for input string overflow */
-			if (presskey_len >= MAX_DELAY_STOP_STR) {
+			if (presskey_len >= DELAY_STOP_STR_MAX_LENGTH) {
 				free(presskey);
 				free(sha);
 				return 0;
@@ -223,7 +223,7 @@ static int passwd_abort_key(uint64_t etime)
 		{ .str = env_get("bootstopkey"),   .retry = 0 },
 	};
 
-	char presskey[MAX_DELAY_STOP_STR];
+	char presskey[DELAY_STOP_STR_MAX_LENGTH];
 	int presskey_len = 0;
 	int presskey_max = 0;
 	int i;
@@ -240,8 +240,8 @@ static int passwd_abort_key(uint64_t etime)
 	for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
 		delaykey[i].len = delaykey[i].str == NULL ?
 				    0 : strlen(delaykey[i].str);
-		delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
-				    MAX_DELAY_STOP_STR : delaykey[i].len;
+		delaykey[i].len = delaykey[i].len > DELAY_STOP_STR_MAX_LENGTH ?
+				    DELAY_STOP_STR_MAX_LENGTH : delaykey[i].len;
 
 		presskey_max = presskey_max > delaykey[i].len ?
 				    presskey_max : delaykey[i].len;