diff --git a/CMakeLists.txt b/CMakeLists.txt
index 427d540..2141f89 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,10 @@ set (CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set (CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set (CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+endif ()
+
 file (GLOB_RECURSE sources src/*.cpp src/*.h)
 file (GLOB_RECURSE data    resources/data/*)
 file (GLOB_RECURSE image   resources/image/*)