diff --git a/CMakeLists.txt b/CMakeLists.txt
index 277c9490..f8292a12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,10 @@ set (CMAKE_CXX_STANDARD_REQUIRED ON)
 set (CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 set (CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
 
+if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+    add_definitions (-DNDEBUG)
+endif()
+
 #
 # Version
 #