--- SuperTux-v0.6.0-Source/CMakeLists.txt
+++ SuperTux-v0.6.0-Source/CMakeLists.txt
@@ -470,7 +470,6 @@
 include_directories(${CMAKE_BINARY_DIR}/)
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/)
 include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/external/findlocale/)
-include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/external/obstack/)
 include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/external/sexp-cpp/include/)
 include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/external/SDL_SavePNG/)
 
@@ -481,7 +480,7 @@
 
 ## Build list of sources for supertux binary
 
-file(GLOB SUPERTUX_SOURCES_C RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} external/obstack/*.c external/findlocale/findlocale.c)
+file(GLOB SUPERTUX_SOURCES_C RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} external/findlocale/findlocale.c)
 
 file(GLOB SUPERTUX_SOURCES_CXX RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} src/*/*.cpp src/supertux/menu/*.cpp src/video/sdl/*.cpp src/video/null/*.cpp)
 file(GLOB SUPERTUX_RESOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "${PROJECT_BINARY_DIR}/tmp/*.rc")