diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ae9ff17c..3a491fa32 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -314,7 +314,7 @@ endif ()
 
 target_include_directories(${PROJECT_NAME} PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/Quotient>
+    $<BUILD_INTERFACE:$<$<NOT:$<BOOL:${QUOTIENT_FORCE_NAMESPACED_INCLUDES}>>:${CMAKE_CURRENT_SOURCE_DIR}/Quotient>>
     $<INSTALL_INTERFACE:${${PROJECT_NAME}_INSTALL_INCLUDEDIR}>
 )