diff --git a/tools/FindCatch.cmake b/tools/FindCatch.cmake
index 4d6bffcf68..57bba58b30 100644
--- a/tools/FindCatch.cmake
+++ b/tools/FindCatch.cmake
@@ -9,6 +9,8 @@
 #  CATCH_INCLUDE_DIR      - path to catch.hpp
 #  CATCH_VERSION          - version number
 
+option(DOWNLOAD_CATCH "Download catch2 if not found")
+
 if(NOT Catch_FIND_VERSION)
   message(FATAL_ERROR "A version number must be specified.")
 elseif(Catch_FIND_REQUIRED)