diff --git a/src/Mod/Material/App/FolderTree.h b/src/Mod/Material/App/FolderTree.h
index 75dd3dfcc7..2cc3133fa6 100644
--- a/src/Mod/Material/App/FolderTree.h
+++ b/src/Mod/Material/App/FolderTree.h
@@ -24,6 +24,8 @@
 
 #include <QString>
 #include <map>
+#include <memory>
+
 
 namespace Materials
 {