diff -urN liborcus-0.5.1.old/src/spreadsheet/sheet.cpp liborcus-0.5.1/src/spreadsheet/sheet.cpp
--- liborcus-0.5.1.old/src/spreadsheet/sheet.cpp	2013-05-27 19:07:41.712302036 +0200
+++ liborcus-0.5.1/src/spreadsheet/sheet.cpp	2013-05-27 19:08:51.432302028 +0200
@@ -734,7 +734,7 @@
         con.build_tree();
 
     size_t index;
-    if (!con.search_tree(col, index))
+    if (!con.search_tree(col, index).second)
         return 0;
 
     return index;