diff --git a/inc/ocf_def.h b/inc/ocf_def.h
index 1346127..0707251 100644
--- a/inc/ocf_def.h
+++ b/inc/ocf_def.h
@@ -293,7 +293,7 @@ typedef enum {
 #define OCF_IO_CLASS_INVALID OCF_IO_CLASS_MAX
 
 /** Maximum size of the IO class name */
-#define OCF_IO_CLASS_NAME_MAX 33
+#define OCF_IO_CLASS_NAME_MAX 1024
 
 /** IO class priority which indicates pinning */
 #define OCF_IO_CLASS_PRIO_PINNED -1