diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b5bafc..52fd884 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,9 @@ set(RS_DIR "${CMAKE_BINARY_DIR}/rslib")
 set(RS_OUT "${CMAKE_BINARY_DIR}")
 set(RS_LIB "${RS_OUT}/libtycho.a")
 
+set(CMAKE_C_FLAGS_DEBUGOPT   "-O2 -g")
+set(CMAKE_CXX_FLAGS_DEBUGOPT "-O2 -g")
+
 find_package(Threads REQUIRED)
 find_package(Qt5Widgets CONFIG REQUIRED)