diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b2d0d22..99aa4031 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,10 @@ project(multivariate-splines)
 cmake_minimum_required(VERSION 2.8)
 set(CMAKE_BUILD_TYPE Release)
 
+if(WIN32)
+    set(CMAKE_CXX_FLAGS_RELEASE "-O2")
+endif(WIN32)
+
 set(MULTIVARIATESPLINES_VERSION_MAJOR 1)
 set(MULTIVARIATESPLINES_VERSION_MINOR 2)
 set(MULTIVARIATESPLINES_VERSION ${MULTIVARIATESPLINES_VERSION_MAJOR}-${MULTIVARIATESPLINES_VERSION_MINOR})