diff --git a/client/cmdhftopaz.c b/client/cmdhftopaz.c
index a6046cee0..2f80b054c 100644
--- a/client/cmdhftopaz.c
+++ b/client/cmdhftopaz.c
@@ -278,7 +278,7 @@ static void topaz_print_control_TLVs(uint8_t *memory) {
 			dynamic_lock_area_t *old = topaz_tag.dynamic_lock_areas;
 			dynamic_lock_area_t *new = topaz_tag.dynamic_lock_areas;
 			if (old == NULL) {
-				new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *) calloc(sizeof(dynamic_lock_area_t, sizeof(uint8_t)));
+				new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *) calloc(sizeof(dynamic_lock_area_t) , sizeof(uint8_t));
 			} else {
 				while(old->next != NULL) {
 					old = old->next;