diff --git a/Source/Modules/CMakeBuildUtilities.cmake b/Source/Modules/CMakeBuildUtilities.cmake
index 9744bb30e8..09d8250cf8 100644
--- a/Source/Modules/CMakeBuildUtilities.cmake
+++ b/Source/Modules/CMakeBuildUtilities.cmake
@@ -150,7 +150,7 @@ else()
   endif()
   set(_CMAKE_USE_OPENSSL_DEFAULT OFF)
   if(NOT DEFINED CMAKE_USE_OPENSSL AND NOT WIN32 AND NOT APPLE
-      AND CMAKE_SYSTEM_NAME MATCHES "(Linux|FreeBSD)")
+      AND CMAKE_SYSTEM_NAME MATCHES "(Linux|FreeBSD|CYGWIN|MSYS)")
     set(_CMAKE_USE_OPENSSL_DEFAULT ON)
   endif()
   option(CMAKE_USE_OPENSSL "Use OpenSSL." ${_CMAKE_USE_OPENSSL_DEFAULT})