diff --git a/CMakeLists.txt b/CMakeLists.txt
index 34300d41ad..09b2e0d45f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -721,6 +721,8 @@ else()
   OCCT_CHECK_AND_UNSET ("3RDPARTY_DOT_EXECUTABLE")
 endif()
 
+list (REMOVE_ITEM BUILD_TOOLKITS ExpToCasExe)
+
 # bison
 if (BUILD_YACCLEX)
   list (APPEND OCCT_3RDPARTY_CMAKE_LIST "adm/cmake/bison")