diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 01487192f628..020142bb9735 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -233,7 +233,7 @@ static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
 	memcpy(dst, src, sizeof(bdaddr_t));
 }
 
-void baswap(bdaddr_t *dst, bdaddr_t *src);
+void baswap(bdaddr_t *dst, const bdaddr_t *src);
 
 /* Common socket structures and functions */
 
diff --git a/net/bluetooth/lib.c b/net/bluetooth/lib.c
index aa4cf64e32a6..63e65d9b4b24 100644
--- a/net/bluetooth/lib.c
+++ b/net/bluetooth/lib.c
@@ -30,10 +30,10 @@
 
 #include <net/bluetooth/bluetooth.h>
 
-void baswap(bdaddr_t *dst, bdaddr_t *src)
+void baswap(bdaddr_t *dst, const bdaddr_t *src)
 {
-	unsigned char *d = (unsigned char *) dst;
-	unsigned char *s = (unsigned char *) src;
+	const unsigned char *s = (const unsigned char *)src;
+	unsigned char *d = (unsigned char *)dst;
 	unsigned int i;
 
 	for (i = 0; i < 6; i++)