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-rw-r--r--src/group_gui.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index 0b6c860dd..c332c934d 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -30,6 +30,8 @@
#include "table/sprites.h"
+#include "safeguards.h"
+
static const int LEVEL_WIDTH = 10; ///< Indenting width of a sub-group in pixels
typedef GUIList<const Group*> GUIGroupList;