diff --git a/servermain.cpp b/servermain.cpp
index ea3d29d..c354aee 100644
--- a/servermain.cpp
+++ b/servermain.cpp
@@ -535,8 +535,9 @@ void servermain::loadSettings()
             guid = QUuid::createUuid().toString();
             settings->setValue("GUID", guid);
         }
+#if (QT_VERSION >= QT_VERSION_CHECK(5,10,0))
         memcpy(tempPrefs->guid, QUuid::fromString(guid).toRfc4122().constData(), GUIDLEN);
-
+#endif
         tempPrefs->rxAudioSetup.isinput = true;
         tempPrefs->txAudioSetup.isinput = false;
         tempPrefs->rxAudioSetup.localAFgain = 255;
diff --git a/wfmain.cpp b/wfmain.cpp
index d2955e7..0931669 100644
--- a/wfmain.cpp
+++ b/wfmain.cpp
@@ -1693,7 +1693,9 @@ void wfmain::loadSettings()
         guid = QUuid::createUuid().toString();
         settings->setValue("GUID", guid);
     }
+#if (QT_VERSION >= QT_VERSION_CHECK(5,10,0))
     memcpy(rigTemp->guid, QUuid::fromString(guid).toRfc4122().constData(), GUIDLEN);
+#endif
 
     ui->serverRXAudioInputCombo->blockSignals(true);
     rigTemp->rxAudioSetup.name = settings->value("ServerAudioInput", "").toString();