diff --git a/CMakeLists_mingw.txt b/CMakeLists_mingw.txt
index b694795580..335da5da77 100644
--- a/CMakeLists_mingw.txt
+++ b/CMakeLists_mingw.txt
@@ -1,5 +1,3 @@
-SET(CMAKE_SYSTEM_NAME Windows)
-
 SET(COMPILER_PREFIX i686-w64-mingw32)
 SET(CMAKE_C_COMPILER ${COMPILER_PREFIX}-gcc)
 SET(CMAKE_CXX_COMPILER ${COMPILER_PREFIX}-c++)