diff --git a/lib/libsdp/sdp.h b/lib/libsdp/sdp.h
index acb074a7bb04..35dbea732fa5 100644
--- a/lib/libsdp/sdp.h
+++ b/lib/libsdp/sdp.h
@@ -312,13 +312,13 @@ typedef struct sdp_attr *	sdp_attr_p;
 
 /* Inline versions of get/put byte/short/long. Pointer is advanced */
 #define SDP_GET8(b, cp) { \
-	register uint8_t *t_cp = (uint8_t *)(cp); \
+	const uint8_t *t_cp = (const uint8_t *)(cp); \
 	(b) = *t_cp; \
 	(cp) ++; \
 }
 
 #define SDP_GET16(s, cp) { \
-	register uint8_t *t_cp = (uint8_t *)(cp); \
+	const uint8_t *t_cp = (const uint8_t *)(cp); \
 	(s) = ((uint16_t)t_cp[0] << 8) \
 	    | ((uint16_t)t_cp[1]) \
 	    ; \
@@ -326,7 +326,7 @@ typedef struct sdp_attr *	sdp_attr_p;
 }
 
 #define SDP_GET32(l, cp) { \
-	register uint8_t *t_cp = (uint8_t *)(cp); \
+	const uint8_t *t_cp = (const uint8_t *)(cp); \
 	(l) = ((uint32_t)t_cp[0] << 24) \
 	    | ((uint32_t)t_cp[1] << 16) \
 	    | ((uint32_t)t_cp[2] << 8) \