diff --git a/src/aui/auibook.cpp b/src/aui/auibook.cpp
index 276eb8956e..a634917abd 100644
--- a/src/aui/auibook.cpp
+++ b/src/aui/auibook.cpp
@@ -809,6 +809,8 @@ public:
         *x = m_rect.width;
         *y = m_rect.height;
     }
+
+    bool Show( bool WXUNUSED(show = true) ) { return false; }
     
     void DoSizing()
     {