diff --git a/src/OpenFOAM/db/Time/Time.C b/src/OpenFOAM/db/Time/Time.C
index 0afa8d69b3..b9eebc0d7f 100644
--- a/src/OpenFOAM/db/Time/Time.C
+++ b/src/OpenFOAM/db/Time/Time.C
@@ -552,8 +552,9 @@ bool Foam::Time::end() const
 }
 
 
-void Foam::Time::stopAt(const stopAtControls sa) const
+bool Foam::Time::stopAt(const stopAtControls sa) const
 {
+    const bool changed = (stopAt_ != sa);
     stopAt_ = sa;
 
     // adjust endTime
@@ -565,6 +566,7 @@ void Foam::Time::stopAt(const stopAtControls sa) const
     {
         endTime_ = GREAT;
     }
+    return changed;
 }
 
 
diff --git a/src/OpenFOAM/db/Time/Time.H b/src/OpenFOAM/db/Time/Time.H
index 7596fee0c9..55b02813c9 100644
--- a/src/OpenFOAM/db/Time/Time.H
+++ b/src/OpenFOAM/db/Time/Time.H
@@ -406,7 +406,8 @@ public:
 
             //- Adjust the current stopAtControl. Note that this value
             //  only persists until the next time the dictionary is read.
-            virtual void stopAt(const stopAtControls) const;
+            //  Return true if the stopAtControl changed.
+            virtual bool stopAt(const stopAtControls) const;
 
             //- Reset the time and time-index to those of the given time
             virtual void setTime(const Time&);