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-rw-r--r--src/dialogs/clonetiler.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/dialogs/clonetiler.cpp b/src/dialogs/clonetiler.cpp
index 5f59ddfcf..f3621bbdd 100644
--- a/src/dialogs/clonetiler.cpp
+++ b/src/dialogs/clonetiler.cpp
@@ -31,6 +31,7 @@
#include "display/drawing-context.h"
#include "display/drawing-item.h"
#include "document.h"
+#include "document-undo.h"
#include "filter-chemistry.h"
#include "helper/unit-menu.h"
#include "helper/units.h"