diff --git a/code/ryzom/client/src/interface_v3/group_scrolltext.cpp b/code/ryzom/client/src/interface_v3/group_scrolltext.cpp
index f9ddd85fd..2a0885133 100644
--- a/code/ryzom/client/src/interface_v3/group_scrolltext.cpp
+++ b/code/ryzom/client/src/interface_v3/group_scrolltext.cpp
@@ -43,8 +43,9 @@ CGroupScrollText::CGroupScrollText(const TCtorParam &param) :
 										_InvertScrollBar(true),
 										_ListHeight(0),
 										_StartHeight(0),
-										_EllapsedTime(0)
+										_EllapsedTime(0)										
 {
+	_IsGroupScrollText = true;
 }
 
 //========================================================================
diff --git a/code/ryzom/client/src/interface_v3/interface_group.cpp b/code/ryzom/client/src/interface_v3/interface_group.cpp
index 8050e3872..83cb0ca35 100644
--- a/code/ryzom/client/src/interface_v3/interface_group.cpp
+++ b/code/ryzom/client/src/interface_v3/interface_group.cpp
@@ -23,10 +23,7 @@
 #include "interface_group.h"
 #include "interface_link.h"
 #include "widget_manager.h"
-
 #include "ctrl_scroll_base.h"
-#include "group_editbox.h"
-#include "group_scrolltext.h"
 #include "lua_ihm_ryzom.h"
 
 using namespace std;
@@ -57,6 +54,7 @@ CInterfaceGroup::CInterfaceGroup(const TCtorParam &param) : CCtrlBase(param)
 	_Priority= WIN_PRIORITY_NORMAL;
 	_UseCursor = true;
 	_IsGroupContainer = false;
+	_IsGroupScrollText = false;
 	_AHOnActive = NULL;
 	_AHOnDeactive = NULL;
 	_AHOnLeftClick = NULL;
@@ -973,7 +971,7 @@ void CInterfaceGroup::evalChildrenBBox(bool resizeFromChildW, bool resizeFromChi
 			// If it is a group, minimize with MaxHReal / MaxWReal
 			const CInterfaceGroup	*sonGroup= dynamic_cast<const CInterfaceGroup*>(pIE);
 			// \todo yoyo: do not know why but don't work if this==scroll_text
-			if(sonGroup && !dynamic_cast<const CGroupScrollText*>(this))
+			if(sonGroup && !isGroupScrollText())
 			{
 				sint32	oldSciX= -16384;
 				sint32	oldSciY= -16384;
diff --git a/code/ryzom/client/src/interface_v3/interface_group.h b/code/ryzom/client/src/interface_v3/interface_group.h
index d2a93f49c..3b3a59e84 100644
--- a/code/ryzom/client/src/interface_v3/interface_group.h
+++ b/code/ryzom/client/src/interface_v3/interface_group.h
@@ -248,6 +248,7 @@ public:
 
 	// quick way to know if the group is a CGroupContainer
 	bool isGroupContainer() const { return _IsGroupContainer; }
+	bool isGroupScrollText() const{ return _IsGroupScrollText; }
 
 	CInterfaceGroup* getEnclosingContainer();
 
@@ -345,6 +346,7 @@ protected:
 	bool	_Escapable			: 1;
 	bool	_UseCursor			: 1;
 	bool	_IsGroupContainer	: 1;	// faster than a virual call
+	bool	_IsGroupScrollText  : 1;
 	bool	_NeedFrameUpdatePos	: 1;	// typically For CGroupInScene
 	sint32	_ResizeFromChildWMargin;
 	sint32	_ResizeFromChildHMargin;