1 files changed, 2 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index bd35c4b..d32ec42 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,8 @@ PROJECT = cowboy
 
 # Options.
 
+ERLC_OPTS ?= -Werror +debug_info +warn_export_all +warn_export_vars \
+	+warn_shadow_vars +warn_obsolete_guard +warn_missing_spec
 COMPILE_FIRST = cowboy_middleware cowboy_sub_protocol
 CT_SUITES = eunit http spdy ws
 PLT_APPS = crypto public_key ssl