diff --git a/src/libs/cplusplus/CppDocument.cpp b/src/libs/cplusplus/CppDocument.cpp
index cb9598614b6f869489c9ec9b647ea8990847dd68..817d0e9f7695e2c4563ca58f52435e88594c1159 100644
--- a/src/libs/cplusplus/CppDocument.cpp
+++ b/src/libs/cplusplus/CppDocument.cpp
@@ -65,6 +65,7 @@ class FindScopeAt: protected SymbolVisitor
     Scope *_scope;
 
 public:
+    /** line and column should be 1-based */
     FindScopeAt(TranslationUnit *unit, unsigned line, unsigned column)
         : _unit(unit), _line(line), _column(column), _scope(0) {}