diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4cf591..54e4852 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,8 @@ macro(build_mimick)
 
   set(cmake_commands)
   set(cmake_configure_args -Wno-dev)
+  list(APPEND cmake_configure_args -DCMAKE_C_FLAGS="-O2")
+  list(APPEND cmake_configure_args -DCMAKE_CXX_FLAGS="-O2")
   list(APPEND cmake_configure_args -DCMAKE_INSTALL_PREFIX=${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}_install)
 
   if(WIN32)