diff --git a/src/fmt/print.c b/src/fmt/print.c
index a02fb858b..7a13cccda 100644
--- a/src/fmt/print.c
+++ b/src/fmt/print.c
@@ -494,11 +494,11 @@ static int vhprintf(const char *fmt, va_list ap, re_vprintf_h *vph, void *arg,
 out:
 #ifndef RELEASE
 	if (err == ENODATA) {
-		DEBUG_WARNING("Format: \"%b<-- NO ARG\n", fmt, p - fmt + 1);
+		re_fprintf(stderr, "Format: \"%b<-- NO ARG\n", fmt, p - fmt + 1);
 		re_assert(0 && "RE_VA_ARG: no more arguments");
 	}
 	if (err == EOVERFLOW) {
-		DEBUG_WARNING("Format: \"%b<-- SIZE ERROR\n", fmt,
+		re_fprintf(stderr, "Format: \"%b<-- SIZE ERROR\n", fmt,
 			      p - fmt + 1);
 		re_assert(0 && "RE_VA_ARG: arg is not compatible");
 	}
diff --git a/src/rtp/rtcp.c b/src/rtp/rtcp.c
index 51142a726..7622b2926 100644
--- a/src/rtp/rtcp.c
+++ b/src/rtp/rtcp.c
@@ -202,10 +202,10 @@ int rtcp_msg_print(struct re_printf *pf, const struct rtcp_msg *msg)
 	if (!msg)
 		return 0;
 
-	err = re_hprintf(pf, "%8s pad=%d count=%-2d pt=%-3d len=%u ",
+	err = re_hprintf(pf, "%8s pad=%u count=%-2u pt=%-3u len=%u ",
 			 rtcp_type_name((enum rtcp_type)msg->hdr.pt),
-			 msg->hdr.p,
-			 msg->hdr.count, msg->hdr.pt, msg->hdr.length);
+			 (unsigned)msg->hdr.p,
+			 (unsigned)msg->hdr.count, (unsigned)msg->hdr.pt, msg->hdr.length);
 	if (err)
 		return err;
 
@@ -222,7 +222,7 @@ int rtcp_msg_print(struct re_printf *pf, const struct rtcp_msg *msg)
 		for (i=0; i<msg->hdr.count && !err; i++) {
 			const struct rtcp_rr *rr = &msg->r.sr.rrv[i];
 			err = re_hprintf(pf, " {%08x %u %d %u %u %u %u}",
-					 rr->ssrc, rr->fraction, rr->lost,
+					 rr->ssrc, rr->fraction, (int)rr->lost,
 					 rr->last_seq, rr->jitter,
 					 rr->lsr, rr->dlsr);
 		}
@@ -233,7 +233,7 @@ int rtcp_msg_print(struct re_printf *pf, const struct rtcp_msg *msg)
 		for (i=0; i<msg->hdr.count && !err; i++) {
 			const struct rtcp_rr *rr = &msg->r.rr.rrv[i];
 			err = re_hprintf(pf, " {0x%08x %u %d %u %u %u %u}",
-					 rr->ssrc, rr->fraction, rr->lost,
+					 rr->ssrc, rr->fraction, (int)rr->lost,
 					 rr->last_seq, rr->jitter,
 					 rr->lsr, rr->dlsr);
 		}
@@ -258,7 +258,7 @@ int rtcp_msg_print(struct re_printf *pf, const struct rtcp_msg *msg)
 		break;
 
 	case RTCP_BYE:
-		err = re_hprintf(pf, "%u srcs:", msg->hdr.count);
+		err = re_hprintf(pf, "%u srcs:", (unsigned)msg->hdr.count);
 		for (i=0; i<msg->hdr.count && !err; i++) {
 			err = re_hprintf(pf, " %08x",
 					 msg->r.bye.srcv[i]);