diff --git a/Source/CTest/Curl/CMakeLists.txt b/Source/CTest/Curl/CMakeLists.txt
index d5380f6c1..ef3911a54 100644
--- a/Source/CTest/Curl/CMakeLists.txt
+++ b/Source/CTest/Curl/CMakeLists.txt
@@ -207,6 +207,7 @@ IF(NOT HAVE_SIZEOF_SSIZE_T)
 ENDIF(NOT HAVE_SIZEOF_SSIZE_T)
 
 FIND_FILE(RANDOM_FILE urandom /dev)
+MARK_AS_ADVANCED(RANDOM_FILE)
 
 # Check for some functions that are used
 CHECK_SYMBOL_EXISTS(socket        "${CURL_INCLUDES}" HAVE_SOCKET)