[#3141] fix compilation error

diff --git a/src/lib/dhcp/option4_dnr.cc b/src/lib/dhcp/option4_dnr.cc
index 3564612a32dc516418c10b143ba8737279c3c716..a1b5b9b215d59776c8be40c48905468c543f6fd1 100644 (file)
--- a/src/lib/dhcp/option4_dnr.cc
+++ b/src/lib/dhcp/option4_dnr.cc
@@ -720,7 +720,7 @@ DnrInstance::parseDnrInstanceConfigData(const std::string& config_txt) {
                     }
 
                     // Make notice if this is any of http alpn-ids.
-                    if (alpn_id.starts_with('h')) {
+                    if (alpn_id[0] == 'h') {
                         alpn_http_ = true;
                     }