diff --git a/rebar.config b/rebar.config
index caec78c..42b773e 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,5 +1,5 @@
 {port_envs, [
-             {"DRV_CFLAGS",  "$DRV_CFLAGS -Werror -I c_src/system/include -lpthread -DDEBUG"},
+             {"DRV_CFLAGS",  "$DRV_CFLAGS -Werror -I c_src/system/include -lpthread"},
              {"DRV_LDFLAGS", "$DRV_LDFLAGS c_src/system/lib/libdb.a -lpthread"}
             ]}.