1 files changed, 1 insertions, 1 deletions

diff --git a/firmware/drivers/i2c.c b/firmware/drivers/i2c.c
index 24ad77495d..2fc53d579f 100644
--- a/firmware/drivers/i2c.c
+++ b/firmware/drivers/i2c.c
@@ -198,7 +198,7 @@ unsigned char i2c_inb(int ack)
    return byte;
 }
 
-int i2c_write(int address, unsigned char* buf, int count )
+int i2c_write(int address, const unsigned char* buf, int count )
 {
     int i,x=0;