diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c17f37880..4e846abd4a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1430,7 +1430,8 @@ if(SIZEOF_SUSECONDS_T)
   set(HAVE_SUSECONDS_T 1)
 endif()
 
-if(NOT CMAKE_CROSSCOMPILING)
+if(NOT WIN32 AND NOT CMAKE_CROSSCOMPILING AND
+   (NOT DEFINED RANDOM_FILE OR RANDOM_FILE))
   find_file(RANDOM_FILE "urandom" "/dev")
   mark_as_advanced(RANDOM_FILE)
 endif()