diff --git a/src/gtk/listbox.cpp b/src/gtk/listbox.cpp
index 86679dd655..aade5967cf 100644
--- a/src/gtk/listbox.cpp
+++ b/src/gtk/listbox.cpp
@@ -647,7 +647,7 @@ void wxListBox::Clear()
 {
     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 
-    gtk_list_clear_items( m_list, 0, Number() );
+    gtk_list_clear_items( m_list, 0, GetCount() );
 
     if ( HasClientObjectData() )
     {
diff --git a/src/gtk1/listbox.cpp b/src/gtk1/listbox.cpp
index 86679dd655..aade5967cf 100644
--- a/src/gtk1/listbox.cpp
+++ b/src/gtk1/listbox.cpp
@@ -647,7 +647,7 @@ void wxListBox::Clear()
 {
     wxCHECK_RET( m_list != NULL, wxT("invalid listbox") );
 
-    gtk_list_clear_items( m_list, 0, Number() );
+    gtk_list_clear_items( m_list, 0, GetCount() );
 
     if ( HasClientObjectData() )
     {