diff --git a/src/ifcconvert/CMakeLists.txt b/src/ifcconvert/CMakeLists.txt
index 4a889a57bf..a9dbe6e1b7 100644
--- a/src/ifcconvert/CMakeLists.txt
+++ b/src/ifcconvert/CMakeLists.txt
@@ -10,8 +10,5 @@ set(IFCCONVERT_FILES ${IFCCONVERT_CPP_FILES} ${IFCCONVERT_H_FILES})
 add_executable(IfcConvert ${IFCCONVERT_FILES})
 
 target_link_libraries(IfcConvert IfcGeom IfcParse Serializers ${OpenCASCADE_LIBRARIES} ${Boost_LIBRARIES} ${HDF5_LIBRARIES} ${USD_LIBRARIES})
-if(WITH_RELATIONSHIP_VALIDATION)
-    set_property(TARGET IfcConvert APPEND_STRING PROPERTY COMPILE_FLAGS " -DWITH_RELATIONSHIP_VALIDATION")
-endif()
 
 install(TARGETS IfcConvert)