diff --git a/appl/conjugateheattransfer/monolithic/CMakeLists.txt b/appl/conjugateheattransfer/monolithic/CMakeLists.txt
index d8c2d54e536cfe8b6a8a9d5ff930840089b3ab3e..c837d865261603687855085a8864ebf02889a59e 100644
--- a/appl/conjugateheattransfer/monolithic/CMakeLists.txt
+++ b/appl/conjugateheattransfer/monolithic/CMakeLists.txt
@@ -1,3 +1,5 @@
 add_input_file_links()
 
 add_executable(test_conjugate_heat_monolithic EXCLUDE_FROM_ALL main.cc)
+
+target_compile_definitions(test_conjugate_heat_monolithic PUBLIC "ENABLEMONOLITHIC=1")