1 files changed, 8 insertions, 0 deletions
diff --git a/src/gui/itempopup.h b/src/gui/itempopup.h
index 89f6355fe..e6cda2eae 100644
--- a/src/gui/itempopup.h
+++ b/src/gui/itempopup.h
@@ -33,6 +33,14 @@
 class Icon;
 class TextBox;
 
+namespace gcn
+{
+    class Button;
+    class CheckBox;
+    class Label;
+    class ScrollArea;
+}
+
 /**
  * A popup that displays information about an item.
  */