diff --git a/CMake/BuildROMSXExe.cmake b/CMake/BuildROMSXExe.cmake
index 7d6531ed..584af7df 100644
--- a/CMake/BuildROMSXExe.cmake
+++ b/CMake/BuildROMSXExe.cmake
@@ -83,6 +83,7 @@ function(build_romsx_lib romsx_lib_name)
        ${SRC_DIR}/TimeIntegration/ROMSX_vert_mean_3d.cpp
        ${SRC_DIR}/TimeIntegration/ROMSX_ComputeTimestep.cpp
        ${SRC_DIR}/TimeIntegration/ROMSX_TimeStep.cpp
+       ${SRC_DIR}/TimeIntegration/ROMSX_set_weights.cpp
   )
 
   if(NOT "${romsx_exe_name}" STREQUAL "romsx_unit_tests")