1 files changed, 6 insertions, 0 deletions
diff --git a/src/gui/itemamountwindow.h b/src/gui/itemamountwindow.h
index 076101c0f..0e692dac2 100644
--- a/src/gui/itemamountwindow.h
+++ b/src/gui/itemamountwindow.h
@@ -35,6 +35,12 @@ class ItemsModal;
 class ItemPopup;
 class Label;
 
+namespace gcn
+{
+    class DropDown;
+    class Slider;
+}
+
 /**
  * Window used for selecting the amount of items to drop, trade or split.
  *