diff --git a/src/Algorithms/CMakeLists.txt b/src/Algorithms/CMakeLists.txt
index 0a189b6..794a145 100644
--- a/src/Algorithms/CMakeLists.txt
+++ b/src/Algorithms/CMakeLists.txt
@@ -6,6 +6,7 @@ SET (_HDRS
 	ImageReconstruction.h
 	CollimatorPhysics.h
 	FFT.h
+	GreensFunction.h
   )
 
 ADD_SOURCES (${_SRCS})