diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b8b49b..33973c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.7.2)
 project (dump-build-information)
 add_executable(dummy dummy.cpp )
 set_target_properties(dummy PROPERTIES COMPILE_FLAGS ${BUILD_FLAGS} -frecord-gcc-switches)
+set(CMAKE_BUILD_TYPE Release)
 
 add_custom_command (OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/buildinformation.h
 	COMMAND echo \"\#define USED_FLAGS \\\"\"`readelf -p .GCC.command.line ${CMAKE_CURRENT_BINARY_DIR}/dummy | grep -v -e dummy -e "-frecord-gcc-switches" | grep -e \"\\[.*\\]\" | cut -d\\] -f2- | tr -d \"\\n\"`\\\" >> ${CMAKE_CURRENT_BINARY_DIR}/buildinformation.h