diff --git a/Tests/Functional/GUIProjectCompatibility/CMakeLists.txt b/Tests/Functional/GUIProjectCompatibility/CMakeLists.txt
index fa3481a04b97f6c7cd90f6df85e9cdd4dc46cc89..3f3f306ce44ccebad57945e99ceaf42202febe4e 100644
--- a/Tests/Functional/GUIProjectCompatibility/CMakeLists.txt
+++ b/Tests/Functional/GUIProjectCompatibility/CMakeLists.txt
@@ -6,6 +6,8 @@ file(GLOB source_files *.cpp)
 
 add_executable(${test} ${source_files} ${CMAKE_SOURCE_DIR}/Tests/GTestWrapper/TestAll.cpp)
 
+target_include_directories(${test} PUBLIC ${CMAKE_SOURCE_DIR})
+
 target_link_libraries(${test} BornAgainGUI gtest)
 
 gtest_discover_tests(${test} DISCOVERY_TIMEOUT 300 TEST_PREFIX Functional.GUIProjectCompatibility.)