diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7c01c5ce..4300fb4f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -242,6 +242,7 @@ install(FILES "${CMAKE_CURRENT_BINARY_DIR}/KDDockWidgetsConfig.cmake"
 if(${PROJECT_NAME}_DEVELOPER_MODE)
   # Under developer mode since kddw might be a sub-folder of a project setting a different value for QT_DISABLE_DEPRECATED_BEFORE
   target_compile_definitions(kddockwidgets PRIVATE QT_DISABLE_DEPRECATED_BEFORE=0x060000)
+  set_target_properties(kddockwidgets PROPERTIES UNITY_BUILD ON)
 
   if (NOT ${PROJECT_NAME}_QTQUICK) # TODO: We can support it
     add_executable(kddockwidgets_linter layoutlinter_main.cpp)
diff --git a/src/private/multisplitter/CMakeLists.txt b/src/private/multisplitter/CMakeLists.txt
index b47ab6f3..defafadc 100644
--- a/src/private/multisplitter/CMakeLists.txt
+++ b/src/private/multisplitter/CMakeLists.txt
@@ -73,6 +73,8 @@ if(${PROJECT_NAME}_DEVELOPER_MODE)
   # Under developer mode since kddw might be a sub-folder of a project setting a different value for QT_DISABLE_DEPRECATED_BEFORE
   target_compile_definitions(kddockwidgets_multisplitter PRIVATE QT_DISABLE_DEPRECATED_BEFORE=0x060000)
 
+  set_target_properties(kddockwidgets_multisplitter PROPERTIES UNITY_BUILD ON)
+
   if(${PROJECT_NAME}_TESTS AND NOT ${PROJECT_NAME}_QTQUICK)
     add_subdirectory(tests)
   endif()