diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b11dc2..900401a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,9 +127,9 @@ endif()
 
 # CYGWIN or GCC 4.5.x bug
 if(CYGWIN)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=gnu++0x")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
 else()
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++0x")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
 endif()
 
 include(CheckCXXCompilerFlag)