diff --git a/cmake/warnings.cmake b/cmake/warnings.cmake
index f0e90c9a90e..4006b0f2e12 100644
--- a/cmake/warnings.cmake
+++ b/cmake/warnings.cmake
@@ -49,7 +49,7 @@ endmacro ()
 add_warning(all)
 add_warning(extra)
 add_warning(pedantic)
-# add_warning(error) # treat all warnings as errors
+add_warning(error) # treat all warnings as errors
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     add_warning(strict-overflow=1)
 endif()