diff --git a/CMakeLists_mingw.txt b/CMakeLists_mingw.txt
index 580a84235f..b694795580 100644
--- a/CMakeLists_mingw.txt
+++ b/CMakeLists_mingw.txt
@@ -13,7 +13,7 @@ SET(PKG_CONFIG_EXECUTABLE ${COMPILER_PREFIX}-pkg-config)
 set(CMAKE_C_FLAGS "-masm=intel -std=gnu99 -fpack-struct=1" CACHE STRING "" FORCE)
 set(CMAKE_CXX_FLAGS "-masm=intel -std=c++0x -std=gnu++0x -fpack-struct=1" CACHE STRING "" FORCE)
 if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-    set(CMAKE_SHARED_LINKER_FLAGS "-static-libgcc -static-libstdc++ -static -lpthread" CACHE STRING "" FORCE)
+    set(CMAKE_SHARED_LINKER_FLAGS "-O3 -static-libgcc -static-libstdc++ -static -lpthread" CACHE STRING "" FORCE)
 else()
     set(CMAKE_SHARED_LINKER_FLAGS "-static-libgcc -static-libstdc++" CACHE STRING "" FORCE)
 endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")