1 files changed, 1 insertions, 1 deletions

diff --git a/apps/debug_menu.c b/apps/debug_menu.c
index 0f4305640e..9fd2e33749 100644
--- a/apps/debug_menu.c
+++ b/apps/debug_menu.c
@@ -202,7 +202,7 @@ bool dbg_mpeg_thread(void)
 
 
 /* Tool function to calculate a CRC16 across some buffer */
-unsigned short crc_16(unsigned char* buf, unsigned len)
+unsigned short crc_16(const unsigned char* buf, unsigned len)
 {
     /* CCITT standard polynomial 0x1021 */
     static const unsigned short crc16_lookup[16] =