diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 885221703fb738ad20d14c233f69590f636aef1f..8c07f8e59c0a175abf5f02cbd536c92937a3b995 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -239,7 +239,6 @@ install(FILES FiniteDifference/Average.hpp
       	      FiniteDifference/mul.hpp 
       	      FiniteDifference/sum.hpp 
 	      FiniteDifference/Upwind_gradient.hpp
-	      FiniteDifference/FD_order1.hpp
 	      FiniteDifference/Eno_Weno.hpp
               FiniteDifference/FD_op.hpp
               FiniteDifference/FD_Solver.hpp