diff --git a/src/mngt/ocf_mngt_cache.c b/src/mngt/ocf_mngt_cache.c
index 98dc487..e195608 100644
--- a/src/mngt/ocf_mngt_cache.c
+++ b/src/mngt/ocf_mngt_cache.c
@@ -672,8 +672,8 @@ static int _ocf_mngt_init_prepare_cache(struct ocf_cache_mngt_init_params *param
 	}
 
 	if (cfg->name) {
-		ret = env_strncpy(cache_name, sizeof(cache_name),
-				cfg->name, sizeof(cache_name));
+		ret = env_strncpy(cache_name, sizeof(cache_name) - 1,
+				cfg->name, sizeof(cache_name) - 1);
 		if (ret)
 			goto out;
 	} else {
diff --git a/src/ocf_cache.c b/src/ocf_cache.c
index dbf7bb8..02470ef 100644
--- a/src/ocf_cache.c
+++ b/src/ocf_cache.c
@@ -26,7 +26,7 @@ ocf_cache_id_t ocf_cache_get_id(ocf_cache_t cache)
 int ocf_cache_set_name(ocf_cache_t cache, const char *src, size_t src_size)
 {
 	OCF_CHECK_NULL(cache);
-	return env_strncpy(cache->name, sizeof(cache->name), src, src_size);
+	return env_strncpy(cache->name, OCF_CACHE_NAME_SIZE - 1, src, src_size);
 }
 
 const char *ocf_cache_get_name(ocf_cache_t cache)
diff --git a/src/ocf_core.c b/src/ocf_core.c
index 705d650..f6d66da 100644
--- a/src/ocf_core.c
+++ b/src/ocf_core.c
@@ -54,7 +54,7 @@ int ocf_core_set_name(ocf_core_t core, const char *src, size_t src_size)
 	OCF_CHECK_NULL(core);
 	OCF_CHECK_NULL(src);
 
-	return env_strncpy(core->name, sizeof(core->name), src, src_size);
+	return env_strncpy(core->name, OCF_CORE_NAME_SIZE - 1, src, src_size);
 }
 
 const char *ocf_core_get_name(ocf_core_t core)
diff --git a/src/ocf_io_class.c b/src/ocf_io_class.c
index 6ded6d1..ad28306 100644
--- a/src/ocf_io_class.c
+++ b/src/ocf_io_class.c
@@ -27,7 +27,7 @@ int ocf_cache_io_class_get_info(ocf_cache_t cache, uint32_t io_class,
 		return -OCF_ERR_IO_CLASS_NOT_EXIST;
 	}
 
-	if (env_strncpy(info->name, sizeof(info->name),
+	if (env_strncpy(info->name, OCF_IO_CLASS_NAME_MAX - 1,
 			cache->user_parts[part_id].config->name,
 			sizeof(cache->user_parts[part_id].config->name))) {
 		return -OCF_ERR_INVAL;