diff --git a/src/Task.cpp b/src/Task.cpp
index 7e35548a3..d6c995b9b 100644
--- a/src/Task.cpp
+++ b/src/Task.cpp
@@ -1952,7 +1952,6 @@ void Task::modify (modType type, bool text_required /* = false */)
             Eval e;
             e.addSource (domSource);
             e.addSource (namedDates);
-            e.ambiguity (false);
             contextTask = *this;
 
             Variant v;
@@ -1991,7 +1990,6 @@ void Task::modify (modType type, bool text_required /* = false */)
             Eval e;
             e.addSource (domSource);
             e.addSource (namedDates);
-            e.ambiguity (false);
             contextTask = *this;
 
             Variant v;
@@ -2013,7 +2011,6 @@ void Task::modify (modType type, bool text_required /* = false */)
             Eval e;
             e.addSource (domSource);
             e.addSource (namedDates);
-            e.ambiguity (false);
             contextTask = *this;
 
             Variant v;
@@ -2039,7 +2036,6 @@ void Task::modify (modType type, bool text_required /* = false */)
               Eval e;
               e.addSource (domSource);
               e.addSource (namedDates);
-              e.ambiguity (false);
               contextTask = *this;
 
               Variant v;