diff --git a/CMakeLists.txt b/CMakeLists.txt index 833e3ce91..573d74d49 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1300,7 +1300,7 @@ CHECK_CXX_SOURCE_COMPILES("#include \nvoid GLAPIENTRY OpenGLDebugProc if(USE_GTK) SET(WITH_DEVELOPER_MODE ${GTK3_FOUND}) SET(WITH_GLIB ${GTK3_FOUND}) - include_directories(${GTK3_INCLUDE_DIRS}) + include_directories(SYSTEM ${GTK3_INCLUDE_DIRS}) target_link_libraries(openclonk ${GTK3_LIBRARIES} )