diff --git a/Appl/CEP/CS1/CS1_Flagger2/src/FlaggerProcessControl.cc b/Appl/CEP/CS1/CS1_Flagger2/src/FlaggerProcessControl.cc
index a5bfce59df5af28583129406bedc10561ffbf792..0ed081245ccf70551a12a004fdd5b24592ca32a5 100644
--- a/Appl/CEP/CS1/CS1_Flagger2/src/FlaggerProcessControl.cc
+++ b/Appl/CEP/CS1/CS1_Flagger2/src/FlaggerProcessControl.cc
@@ -126,6 +126,11 @@ namespace LOFAR
       return true;
     }
 
+    //===============>>> FlaggerProcessControl::release  <<<=============================
+    tribool FlaggerProcessControl::release()
+    { return false;
+    }
+
     //===============>>> FlaggerProcessControl::recover  <<<=============================
     tribool FlaggerProcessControl::recover(const std::string&)
     { return false;