Index: head/lib/libsdp/service.c
===================================================================
--- head/lib/libsdp/service.c	(revision 298831)
+++ head/lib/libsdp/service.c	(working copy)
@@ -225,8 +225,8 @@
 		return (-1);
 	}
 
-	error  = (uint16_t) ss->rsp[sizeof(pdu)] << 8;
-	error |= (uint16_t) ss->rsp[sizeof(pdu) + 1];
+	error  = (uint16_t) ss->rsp[sizeof(*pdu)] << 8;
+	error |= (uint16_t) ss->rsp[sizeof(*pdu) + 1];
 
 	if (error != 0) {
 		ss->error = EIO;