error: invalid suffix on literal; C++11 requires a space between literal and identifier

Index: src/interface.cpp
--- src/interface.cpp.orig
+++ src/interface.cpp
@@ -2187,7 +2187,7 @@ void CreateInterface(sParamRender *default_settings)
 
 	Interface.label_NavigatorEstimatedDistance = gtk_label_new("Estimated distance to the surface:");
 
-	Interface.label_about = gtk_label_new("Mandelbulber "MANDELBULBER_VERSION_STR"\n"
+	Interface.label_about = gtk_label_new("Mandelbulber " MANDELBULBER_VERSION_STR "\n"
 		"author: Krzysztof Marczak\n"
 		"Licence: GNU GPL v3\n"
 		"www: www.mandelbulber.com\n"