diff --git a/scripts/build/make/dnx.mk b/scripts/build/make/dnx.mk
index 201d4fce..2e049626 100644
--- a/scripts/build/make/dnx.mk
+++ b/scripts/build/make/dnx.mk
@@ -44,7 +44,7 @@ project.lock.json: project.json
 	$(dnu) restore
 
 watch: project.lock.json
-	MONO_OPTIONS=--debug ASPNET_ENV=$(ASPNET_ENV) ASPNET_LOG_LEVEL=$(ASPNET_LOG_LEVEL) dnx-watch web --configuration=$(CONFIGURATION)
+	MONO_MANAGED_WATCHER=enabled ASPNET_ENV=$(ASPNET_ENV) ASPNET_LOG_LEVEL=$(ASPNET_LOG_LEVEL) dnx-watch web --configuration=$(CONFIGURATION)
 
 clean:
 	rm -rf bin obj