diff --git a/src/columns/ColTypeString.cpp b/src/columns/ColTypeString.cpp
index 144350a23..10ee41480 100644
--- a/src/columns/ColTypeString.cpp
+++ b/src/columns/ColTypeString.cpp
@@ -52,3 +52,9 @@ void ColumnTypeString::render (
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+void ColumnTypeString::modify (Task& task, const std::string& value)
+{
+  task.set (_name, value);
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/src/columns/ColTypeString.h b/src/columns/ColTypeString.h
index 71ca92eb2..4f526b469 100644
--- a/src/columns/ColTypeString.h
+++ b/src/columns/ColTypeString.h
@@ -39,6 +39,7 @@ public:
   ColumnTypeString ();
   virtual void measure (Task&, unsigned int&, unsigned int&);
   virtual void render (std::vector <std::string>&, Task&, int, Color&);
+  virtual void modify (Task&, const std::string&);
 };
 
 #endif