diff --git a/bcal/bcal-nessie.c b/bcal/bcal-nessie.c
index 9b4cc25..4fabd58 100644
--- a/bcal/bcal-nessie.c
+++ b/bcal/bcal-nessie.c
@@ -66,7 +66,7 @@ void bcal_nessie(const bcdesc_t* bcd){
 
 }
 
-void bcal_nessie_multiple(const bcdesc_t** bcd_list){
+void bcal_nessie_multiple(const bcdesc_t* const * bcd_list){
 	const bcdesc_t* bcd;
 	for(;;){
 		bcd = *bcd_list++;
diff --git a/bcal/bcal-nessie.h b/bcal/bcal-nessie.h
index 23a0e75..203f7cc 100644
--- a/bcal/bcal-nessie.h
+++ b/bcal/bcal-nessie.h
@@ -31,7 +31,7 @@
 #include "blockcipher_descriptor.h"
 
 void bcal_nessie(const bcdesc_t* bcd);
-void bcal_nessie_multiple(const bcdesc_t** bcd_list);
+void bcal_nessie_multiple(const bcdesc_t* const * bcd_list);
 
 
 #endif /* BCALNESSIE_H_ */