diff --git a/gui/main.cpp b/gui/main.cpp
index 02ee24eae..d0df43d25 100644
--- a/gui/main.cpp
+++ b/gui/main.cpp
@@ -29,7 +29,7 @@ int main(int argc, char *argv[])
     app.setWindowIcon(QIcon(":icon.png"));
 
     // Register this metatype that is used to transfer error info
-    qRegisterMetaType<QList<unsigned int>>("QList<unsigned int>");
+    qRegisterMetaType< QList<unsigned int> >("QList<unsigned int>");
 
     // Set codecs so that UTF-8 strings in sources are handled correctly.
     QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));