diff --git a/vlsisapd/CMakeLists.txt b/vlsisapd/CMakeLists.txt
index bf1573ec..41cf2161 100644
--- a/vlsisapd/CMakeLists.txt
+++ b/vlsisapd/CMakeLists.txt
@@ -4,6 +4,11 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.4.0)
 
 LIST(INSERT CMAKE_MODULE_PATH 0 "${VLSISAPD_SOURCE_DIR}/cmake_modules")
 
+SET(CMAKE_C_FLAGS_DEBUG     "-g -Wall" CACHE STRING "Debug options." FORCE)
+SET(CMAKE_CXX_FLAGS_DEBUG   "-g -Wall" CACHE STRING "Debug options." FORCE)
+SET(CMAKE_C_FLAGS_RELEASE   "-O3 -DNDEBUG -Wall" CACHE STRING "Release options." FORCE)
+SET(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG -Wall" CACHE STRING "Release options." FORCE)
+
 FIND_PACKAGE(LibXml2 REQUIRED)
 FIND_PACKAGE(PythonSitePackages REQUIRED)