diff --git a/src/libosmo-mgcp/mgcp_stat.c b/src/libosmo-mgcp/mgcp_stat.c
index 4072ac0..3685cfe 100644
--- a/src/libosmo-mgcp/mgcp_stat.c
+++ b/src/libosmo-mgcp/mgcp_stat.c
@@ -25,6 +25,7 @@
 #include <osmocom/mgcp/mgcp_stat.h>
 #include <osmocom/mgcp/mgcp_endp.h>
 #include <limits.h>
+#include <inttypes.h>
 
 /* Helper function for mgcp_format_stats_rtp() to calculate packet loss */
 void calc_loss(struct mgcp_conn_rtp *conn, uint32_t *expected, int *loss)
@@ -80,7 +81,7 @@
 	jitter = calc_jitter(&conn->state);
 
 	nchars = snprintf(str, str_len,
-			  "\r\nP: PS=%lu, OS=%lu, PR=%lu, OR=%lu, PL=%d, JI=%u",
+			  "\r\nP: PS=%" PRIu64 ", OS=%" PRIu64 ", PR=%" PRIu64 ", OR=%" PRIu64 ", PL=%d, JI=%u",
 			  packets_tx->current, octets_tx->current,
 			  packets_rx->current, octets_rx->current,
 			  ploss, jitter);
@@ -93,7 +94,7 @@
 	if (conn->conn->endp->cfg->osmux != OSMUX_USAGE_OFF) {
 		/* Error Counter */
 		nchars = snprintf(str, str_len,
-				  "\r\nX-Osmo-CP: EC TI=%lu, TO=%lu",
+				  "\r\nX-Osmo-CP: EC TI=%" PRIu64 ", TO=%" PRIu64,
 				  conn->state.in_stream.err_ts_ctr->current,
 				  conn->state.out_stream.err_ts_ctr->current);
 		if (nchars < 0 || nchars >= str_len)
diff --git a/src/libosmo-mgcp/mgcp_vty.c b/src/libosmo-mgcp/mgcp_vty.c
index b586ff6..ad462b7 100644
--- a/src/libosmo-mgcp/mgcp_vty.c
+++ b/src/libosmo-mgcp/mgcp_vty.c
@@ -30,6 +30,7 @@
 #include <osmocom/mgcp/mgcp_endp.h>
 
 #include <string.h>
+#include <inttypes.h>
 
 #define RTCP_OMIT_STR "Drop RTCP packets in both directions\n"
 #define RTP_PATCH_STR "Modify RTP packet header in both directions\n"
@@ -164,8 +165,8 @@
 	dropped_packets = &conn->rate_ctr_group->ctr[RTP_DROPPED_PACKETS_CTR];
 
 	vty_out(vty,
-		"   Timestamp Errs: %lu->%lu%s"
-		"   Dropped Packets: %lu%s"
+		"   Timestamp Errs: %" PRIu64 "->%" PRIu64 "%s"
+		"   Dropped Packets: %" PRIu64 "%s"
 		"   Payload Type: %d Rate: %u Channels: %d %s"
 		"   Frame Duration: %u Frame Denominator: %u%s"
 		"   FPP: %d Packet Duration: %u%s"