diff --git a/openbsc/src/gprs/gprs_gsup_messages.c b/openbsc/src/gprs/gprs_gsup_messages.c
index 8996fe2..9d9b6be 100644
--- a/openbsc/src/gprs/gprs_gsup_messages.c
+++ b/openbsc/src/gprs/gprs_gsup_messages.c
@@ -153,7 +153,7 @@
 
 parse_error:
 	LOGP(DGPRS, LOGL_ERROR,
-	     "GSUP IE type %d, length %d invalid in PDP info\n", iei, value_len);
+	     "GSUP IE type %d, length %zu invalid in PDP info\n", iei, value_len);
 
 	return -1;
 }
diff --git a/openbsc/src/gprs/gprs_subscriber.c b/openbsc/src/gprs/gprs_subscriber.c
index e3da0f8..60f223a 100644
--- a/openbsc/src/gprs/gprs_subscriber.c
+++ b/openbsc/src/gprs/gprs_subscriber.c
@@ -197,7 +197,7 @@
 	struct sgsn_subscriber_data *sdata = subscr->sgsn_data;
 
 	LOGGSUBSCRP(LOGL_INFO, subscr,
-		"Got SendAuthenticationInfoResult, num_auth_tuples = %d\n",
+		"Got SendAuthenticationInfoResult, num_auth_tuples = %zu\n",
 		gsup_msg->num_auth_tuples);
 
 	if (gsup_msg->num_auth_tuples > 0) {
@@ -210,10 +210,10 @@
 	for (idx = 0; idx < gsup_msg->num_auth_tuples; idx++) {
 		size_t key_seq = gsup_msg->auth_tuples[idx].key_seq;
 		LOGGSUBSCRP(LOGL_DEBUG, subscr,
-			"Adding auth tuple, cksn = %d\n", key_seq);
+			"Adding auth tuple, cksn = %zu\n", key_seq);
 		if (key_seq >= ARRAY_SIZE(sdata->auth_triplets)) {
 			LOGGSUBSCRP(LOGL_NOTICE, subscr,
-				"Skipping auth triplet with invalid cksn %d\n",
+				"Skipping auth triplet with invalid cksn %zu\n",
 				key_seq);
 			continue;
 		}
@@ -275,14 +275,14 @@
 
 		if (pdp_info->apn_enc_len >= sizeof(pdp_data->apn_str)-1) {
 			LOGGSUBSCRP(LOGL_ERROR, subscr,
-			     "APN too long, context id = %d, APN = %s\n",
+			     "APN too long, context id = %zu, APN = %s\n",
 			     ctx_id, osmo_hexdump(pdp_info->apn_enc,
 						  pdp_info->apn_enc_len));
 			continue;
 		}
 
 		LOGGSUBSCRP(LOGL_INFO, subscr,
-		     "Will set PDP info, context id = %d, APN = %s\n",
+		     "Will set PDP info, context id = %zu, APN = %s\n",
 		     ctx_id, osmo_hexdump(pdp_info->apn_enc, pdp_info->apn_enc_len));
 
 		/* Set PDP info [ctx_id] */
diff --git a/openbsc/tests/abis/abis_test.c b/openbsc/tests/abis/abis_test.c
index e7e78d2..53e8a4c 100644
--- a/openbsc/tests/abis/abis_test.c
+++ b/openbsc/tests/abis/abis_test.c
@@ -61,7 +61,7 @@
 	}
 
 	if (descr[0].len != 13) {
-		printf("WRONG SIZE: %d\n", descr[0].len);
+		printf("WRONG SIZE: %zu\n", descr[0].len);
 		abort();
 	}
 
@@ -99,12 +99,12 @@
 	}
 
 	if (descr[0].len != 13) {
-		printf("WRONG SIZE0: %d\n", descr[0].len);
+		printf("WRONG SIZE0: %zu\n", descr[0].len);
 		abort();
 	}
 
 	if (descr[1].len != 13) {
-		printf("WRONG SIZE1: %d\n", descr[1].len);
+		printf("WRONG SIZE1: %zu\n", descr[1].len);
 		abort();
 	}
 
diff --git a/openbsc/tests/gbproxy/gbproxy_test.c b/openbsc/tests/gbproxy/gbproxy_test.c
index 0fc8af2..214d477 100644
--- a/openbsc/tests/gbproxy/gbproxy_test.c
+++ b/openbsc/tests/gbproxy/gbproxy_test.c
@@ -983,15 +983,15 @@
 		real_sendto = dlsym(RTLD_NEXT, "sendto");
 
 	if (dest_host == REMOTE_BSS_ADDR)
-		printf("MESSAGE to BSS at 0x%08x:%d, msg length %d\n%s\n\n",
+		printf("MESSAGE to BSS at 0x%08x:%d, msg length %zu\n%s\n\n",
 		       dest_host, dest_port,
 		       len, osmo_hexdump(buf, len));
 	else if (dest_host == REMOTE_SGSN_ADDR)
-		printf("MESSAGE to SGSN at 0x%08x:%d, msg length %d\n%s\n\n",
+		printf("MESSAGE to SGSN at 0x%08x:%d, msg length %zu\n%s\n\n",
 		       dest_host, dest_port,
 		       len, osmo_hexdump(buf, len));
 	else if (dest_host == REMOTE_SGSN2_ADDR)
-		printf("MESSAGE to SGSN 2 at 0x%08x:%d, msg length %d\n%s\n\n",
+		printf("MESSAGE to SGSN 2 at 0x%08x:%d, msg length %zu\n%s\n\n",
 		       dest_host, dest_port,
 		       len, osmo_hexdump(buf, len));
 	else
@@ -1015,15 +1015,15 @@
 
 	if (nsei == SGSN_NSEI)
 		printf("NS UNITDATA MESSAGE to SGSN, BVCI 0x%04x, "
-		       "msg length %d (%s)\n",
+		       "msg length %zu (%s)\n",
 		       bvci, len, __func__);
 	else if (nsei == SGSN2_NSEI)
 		printf("NS UNITDATA MESSAGE to SGSN 2, BVCI 0x%04x, "
-		       "msg length %d (%s)\n",
+		       "msg length %zu (%s)\n",
 		       bvci, len, __func__);
 	else
 		printf("NS UNITDATA MESSAGE to BSS, BVCI 0x%04x, "
-		       "msg length %d (%s)\n",
+		       "msg length %zu (%s)\n",
 		       bvci, len, __func__);
 
 	if (received_messages) {
@@ -1253,7 +1253,7 @@
 	struct msgb *msg;
 	int ret;
 	if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) {
-		fprintf(stderr, "message too long: %d\n", data_len);
+		fprintf(stderr, "message too long: %zu\n", data_len);
 		return -1;
 	}