diff --git a/src/qtprojectlib/HelperFunctions.cs b/src/qtprojectlib/HelperFunctions.cs
index aed6b84..b007010 100644
--- a/src/qtprojectlib/HelperFunctions.cs
+++ b/src/qtprojectlib/HelperFunctions.cs
@@ -874,7 +874,7 @@ namespace QtProjectLib
 
         public static bool HasQObjectDeclaration(VCFile file)
         {
-            return CxxFileContainsNotCommented(file, new[] { "Q_OBJECT", "Q_GADGET" },
+            return CxxFileContainsNotCommented(file, new[] { "Q_OBJECT", "Q_GADGET", "Q_NAMESPACE" },
                 StringComparison.Ordinal, true);
         }