diff --git a/linphone-app/src/app/App.cpp b/linphone-app/src/app/App.cpp
index d24d02437..45da5437a 100644
--- a/linphone-app/src/app/App.cpp
+++ b/linphone-app/src/app/App.cpp
@@ -21,6 +21,8 @@
 
 #ifdef Q_OS_WIN
 #include <QSettings>
+#include <stdlib.h>
+#include <time.h>
 #endif // ifdef Q_OS_WIN
 #include <QCommandLineParser>
 #include <QDir>
@@ -198,6 +200,17 @@ App::App (int &argc, char *argv[]) : SingleApplication(argc, argv, true, Mode::U
 	
 	setWindowIcon(QIcon(Constants::WindowIconPath));
 	
+	char * tz = getenv("TZ");
+	if(!tz){// If not set, set the environement variable for uses of mktime from the SDK.
+#ifdef Q_OS_WIN
+		_putenv(("TZ="+QTimeZone::systemTimeZoneId().toStdString()).c_str());
+		_tzset();
+#else
+		setenv("TZ", QTimeZone::systemTimeZoneId().toStdString().c_str(), 1);
+		tzset();
+#endif
+	}
+
 	createParser();
 	mParser->process(*this);
 	
diff --git a/linphone-sdk b/linphone-sdk
index 94f3bbb6f..3d12b0566 160000
--- a/linphone-sdk
+++ b/linphone-sdk
@@ -1 +1 @@
-Subproject commit 94f3bbb6f08362f004919aa67d1693c275492129
+Subproject commit 3d12b0566b28082bedf77ca54d7547536cc633fc