diff --git a/src/conf.c b/src/conf.c
index fb9f0658..b0dd6298 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -4443,7 +4443,7 @@ int snd_config_hook_load_for_all_cards(snd_config_t *root, snd_config_t *config,
 					goto __err;
 				}
 				while (1) {
-					char *s = strchr(driver, '.');
+					const char *s = strchr(driver, '.');
 					if (s == NULL)
 						break;
 					driver = s + 1;
diff --git a/src/seq/seqmid.c b/src/seq/seqmid.c
index 280a27bd..2bf6afa0 100644
--- a/src/seq/seqmid.c
+++ b/src/seq/seqmid.c
@@ -424,8 +424,8 @@ int snd_seq_sync_output_queue(snd_seq_t *seq)
  */
 int snd_seq_parse_address(snd_seq_t *seq, snd_seq_addr_t *addr, const char *arg)
 {
-	char *p, *buf;
-	const char *s;
+	char *buf;
+	const char *p, *s;
 	char c;
 	long client, port = 0;
 	int len;
diff --git a/src/ucm/main.c b/src/ucm/main.c
index 72315d28..d2b3c2d9 100644
--- a/src/ucm/main.c
+++ b/src/ucm/main.c
@@ -2379,7 +2379,8 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
 			  const char *identifier,
 			  const char **list[])
 {
-	char *str, *str1;
+	char *str;
+	const char *str1;
 	int err, i;
 
 	if (uc_mgr == NULL || identifier == NULL) {
@@ -2712,7 +2713,8 @@ int snd_use_case_geti(snd_use_case_mgr_t *uc_mgr,
 		      const char *identifier,
 		      long *value)
 {
-	char *str, *str1;
+	char *str;
+	const char *str1;
 	int err;
 
 	pthread_mutex_lock(&uc_mgr->mutex);
@@ -3014,7 +3016,8 @@ int snd_use_case_set(snd_use_case_mgr_t *uc_mgr,
 		     const char *identifier,
 		     const char *value)
 {
-	char *str, *str1;
+	char *str;
+	const char *str1;
 	int err = 0;
 
 	snd_trace(UCM, "{API call} set '%s'='%s'", identifier, value);
diff --git a/src/ucm/ucm_subs.c b/src/ucm/ucm_subs.c
index eb46ffcf..c8b13648 100644
--- a/src/ucm/ucm_subs.c
+++ b/src/ucm/ucm_subs.c
@@ -938,7 +938,7 @@ static int rval_evali(snd_use_case_mgr_t *uc_mgr, snd_config_t *node, const char
  */
 static inline const char *strchr_with_escape(const char *str, char c)
 {
-	char *s;
+	const char *s;
 
 	while (1) {
 		s = strchr(str, c);