diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e6fbbba4..6b6a4142c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -313,7 +313,6 @@ find_package(Boost 1.79.0 REQUIRED COMPONENTS context OPTIONAL_COMPONENTS proces
 # Check if the optional 'process' component was successfully found.
 if(Boost_PROCESS_FOUND)
     # It was found, so we add a compile definition to enable it in the C++ source.
-    target_compile_definitions(core PRIVATE HAS_BOOST_PROCESS)
     message(STATUS "Found optional Boost.Process, enabling advanced debugger pipe.")
 else()
     # It was not found. This is not an error.
@@ -717,6 +716,10 @@ endif()
 
 add_subdirectory(src)
 
+if(Boost_PROCESS_FOUND)
+    target_compile_definitions(core PRIVATE HAS_BOOST_PROCESS)
+endif()
+
 # Set citron project or citron-cmd project as default StartUp Project in Visual Studio depending on whether QT is enabled or not
 if(ENABLE_QT)
     set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT citron)