diff --git a/inc/ocf_mngt.h b/inc/ocf_mngt.h
index 49ea778..1e61690 100644
--- a/inc/ocf_mngt.h
+++ b/inc/ocf_mngt.h
@@ -862,11 +862,6 @@ struct ocf_mngt_io_class_config {
 	 */
 	ocf_cache_mode_t cache_mode;
 
-	/**
-	 * @brief IO class minimum size
-	 */
-	uint32_t min_size;
-
 	/**
 	 * @brief IO class maximum size
 	 */
diff --git a/src/mngt/ocf_mngt_io_class.c b/src/mngt/ocf_mngt_io_class.c
index c7c7b2f..e0b6d7d 100644
--- a/src/mngt/ocf_mngt_io_class.c
+++ b/src/mngt/ocf_mngt_io_class.c
@@ -116,7 +116,7 @@ static int _ocf_mngt_io_class_configure(ocf_cache_t cache,
 	const char *name = cfg->name;
 	int16_t prio = cfg->prio;
 	ocf_cache_mode_t cache_mode = cfg->cache_mode;
-	uint32_t min = cfg->min_size;
+	uint32_t min = 0;
 	uint32_t max = cfg->max_size;
 
 	OCF_CHECK_NULL(cache->device);
diff --git a/tests/unit/tests/mngt/ocf_mngt_io_class.c/ocf_mngt_io_class.c b/tests/unit/tests/mngt/ocf_mngt_io_class.c/ocf_mngt_io_class.c
index db6db4c..04c0741 100644
--- a/tests/unit/tests/mngt/ocf_mngt_io_class.c/ocf_mngt_io_class.c
+++ b/tests/unit/tests/mngt/ocf_mngt_io_class.c/ocf_mngt_io_class.c
@@ -98,7 +98,6 @@ static inline void setup_valid_config(struct ocf_mngt_io_class_config *cfg,
 		cfg[i].name = remove ? NULL : "test_io_class_name" ;
 		cfg[i].prio = i;
 		cfg[i].cache_mode = ocf_cache_mode_pt;
-		cfg[i].min_size = 2*i;
 		cfg[i].max_size = 20*i;
 	}
 }