diff --git a/CMakeLists.txt b/CMakeLists.txt
index 764baacb3..dcbc6f909 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ elseif (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
   set (SOLARIS true)
 elseif (${CMAKE_SYSTEM_NAME} STREQUAL "GNU")
   set (GNUHURD true)
-elseif (${CMAKE_SYSTEM_NAME} MATCHES "CYGWIN")
+elseif (${CMAKE_SYSTEM_NAME} STREQUAL "CYGWIN")
   set (CYGWIN true)
   set (CMAKE_CXX_FLAGS "-std=gnu++0x")
 else (${CMAKE_SYSTEM_NAME} MATCHES "Linux")