diff --git a/CMakeLists.txt b/CMakeLists.txt
index f36b0dee5beb77d6554e5a3b13847047f18c30d6..c13313c6caa133b40fce035ceb1cefb6a7d91a82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,7 @@ if (Boost_FOUND AND TBB_FOUND AND CURL_FOUND AND JSONCPP_FOUND)
     set_target_properties(${SCDAQ_TARGET} PROPERTIES LINKER_LANGUAGE CXX)
     target_link_libraries(${SCDAQ_TARGET} PUBLIC ${SCDAQ_LIB})
     # Toggle CLI Debug build option
+    target_compile_definitions(${SCDAQ_TARGET} PUBLIC $<$<CONFIG:Debug>: ${SCDAQ_TARGET}_DEBUG=1 >)
 else ()
     message("CMake failure: missing components.")
 endif ()