diff --git a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
index 4e7cfb64a8..064555c185 100644
--- a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
+++ b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
@@ -1407,7 +1407,7 @@ public:
             for (auto& path : mtlHeaderPaths)
                 path = path.unquoted();
 
-            s.set ("MTL_HEADER_SEARCH_PATHS", mtlHeaderPaths.joinIntoString (" ").quoted());
+            s.set ("MTL_HEADER_SEARCH_PATHS", "\"" + mtlHeaderPaths.joinIntoString (" ") + "\"");
 
             headerPaths.add ("\"$(inherited)\"");
             s.set ("HEADER_SEARCH_PATHS", indentParenthesisedList (headerPaths, 1));