diff --git a/bcal/bcal-performance.c b/bcal/bcal-performance.c
index 9ad15a9..55e4a94 100644
--- a/bcal/bcal-performance.c
+++ b/bcal/bcal-performance.c
@@ -135,7 +135,7 @@ void bcal_performance(const bcdesc_t* bcd){
 }
 
 
-void bcal_performance_multiple(const bcdesc_t** bcd_list){
+void bcal_performance_multiple(const bcdesc_t* const * bcd_list){
 	const bcdesc_t* bcd;
 	for(;;){
 		bcd = *bcd_list;
diff --git a/bcal/bcal-performance.h b/bcal/bcal-performance.h
index e2aef8d..bc76d51 100644
--- a/bcal/bcal-performance.h
+++ b/bcal/bcal-performance.h
@@ -32,7 +32,7 @@
 #include "blockcipher_descriptor.h"
 
 void bcal_performance(const bcdesc_t* hd);
-void bcal_performance_multiple(const bcdesc_t** hd_list);
+void bcal_performance_multiple(const bcdesc_t* const * hd_list);
 
 
 #endif /* BCAL_PERFORMANCE_H_ */