diff --git a/src/logging/log_daemon_dispatch.c b/src/logging/log_daemon_dispatch.c
index 269255ad5f431f1d8bc28492cd60b2188983f889..160ab00a4bc8a349b0d3641278ef6301943b6c56 100644
--- a/src/logging/log_daemon_dispatch.c
+++ b/src/logging/log_daemon_dispatch.c
@@ -118,8 +118,9 @@ virLogManagerProtocolDispatchDomainReadLogFile(virNetServerPtr server ATTRIBUTE_
 
     if (args->maxlen > VIR_LOG_MANAGER_PROTOCOL_STRING_MAX) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Requested data len %zu is larger than maximum %d"),
-                       args->maxlen, VIR_LOG_MANAGER_PROTOCOL_STRING_MAX);
+                       _("Requested data len %llu is larger than maximum %d"),
+                       (unsigned long long)args->maxlen,
+                       VIR_LOG_MANAGER_PROTOCOL_STRING_MAX);
         goto cleanup;
     }
 
diff --git a/tests/virrotatingfiletest.c b/tests/virrotatingfiletest.c
index ed55e6384e27fbdf1abdf0fc9b5f19b3acfaea6d..03e9664347563e97b877eafd8ac5a9617c99c384 100644
--- a/tests/virrotatingfiletest.c
+++ b/tests/virrotatingfiletest.c
@@ -57,8 +57,9 @@ static int testRotatingFileWriterAssertOneFileSize(const char *filename,
             fprintf(stderr, "File %s should not exist\n", filename);
             return -1;
         } else if (sb.st_size != size) {
-            fprintf(stderr, "File %s should be %zu bytes not %zu\n",
-                    filename, size, sb.st_size);
+            fprintf(stderr, "File %s should be %llu bytes not %llu\n",
+                    filename, (unsigned long long)size,
+                    (unsigned long long)sb.st_size);
             return -1;
         } else {
             return 0;