diff --git a/src/Nazara/Utility/Utility.cpp b/src/Nazara/Utility/Utility.cpp
index 231a3a93c..87b154157 100644
--- a/src/Nazara/Utility/Utility.cpp
+++ b/src/Nazara/Utility/Utility.cpp
@@ -103,7 +103,7 @@ namespace Nz
 		}
 
 		bool bParam;
-		if (!s_initializationParameters.GetBooleanParameter("NoWindowSystem", &bParam) || bParam)
+		if (!s_initializationParameters.GetBooleanParameter("NoWindowSystem", &bParam) || !bParam)
 		{
 			if (!Window::Initialize())
 			{