diff --git a/Appl/CEP/CS1/CS1_InputSection/configure.in b/Appl/CEP/CS1/CS1_InputSection/configure.in
index faf1ce42103fcf3add8d122769e23e1613277616..98e1c57156169ba77f44cbc4fa2fb5c39733bbf3 100644
--- a/Appl/CEP/CS1/CS1_InputSection/configure.in
+++ b/Appl/CEP/CS1/CS1_InputSection/configure.in
@@ -59,7 +59,7 @@ lofar_INTERNAL(LCS/ACC/APS,APS,,1,APS/ParameterSet.h,,)
 lofar_INTERNAL(CEP/tinyCEP,tinyCEP,,1,tinyCEP/TinyDataManager.h,,)
 lofar_INTERNAL(CEP/CEPFrame,CEPFrame,,1,CEPFrame/DataManager.h,,)
 lofar_INTERNAL(Appl/CEP/CS1/CS1_Interface,CS1_Interface,,1,CS1_Interface/DH_RSP.h,,)
-lofar_EXTERNAL(boost,1,boost/thread.hpp,boost_thread)
+lofar_EXTERNAL(boost,1,boost/thread.hpp,"boost_thread boost_date_time")
 
 dnl
 dnl Output Makefiles