diff --git a/CMakeLists.txt b/CMakeLists.txt
index d2766638..e6df0df2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -172,7 +172,6 @@ if (USE_GUI)
         get_filename_component(MY_LIB_DIR ${TK_LIBRARY} DIRECTORY)
         install( DIRECTORY "${MY_LIB_DIR}/tcl8.6"   DESTINATION lib COMPONENT netgen )
         install( DIRECTORY "${MY_LIB_DIR}/tk8.6"    DESTINATION lib COMPONENT netgen )
-        install( DIRECTORY "${MY_LIB_DIR}/tix8.4.3" DESTINATION lib COMPONENT netgen )
         install( DIRECTORY "${MY_LIB_DIR}/../bin" DESTINATION . COMPONENT netgen )
         add_definitions(-DTOGL_WGL)
     else(WIN32)