diff --git a/CMakeLists.txt b/CMakeLists.txt
index 16eb075f2..8dcc59e74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
 project(afina LANGUAGES C CXX)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c99 -Wall -Werror -fPIC")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
 set(CMAKE_THREAD_PREFER_PTHREAD)