diff --git a/CMakeLists.txt b/CMakeLists.txt
index 028406447..f9e6e86ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -197,6 +197,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall \
     -Werror=switch -Werror=switch-bool -Werror=return-type \
     -Werror=return-stack-address \
     -Wno-c99-designator -Wmissing-field-initializers \
+    -pedantic
     -DBOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT")
 
 # Don't omit frame pointer in RelWithDebInfo, for additional callchain debug.