diff --git a/lib/netstd/Makefile.am b/lib/netstd/Makefile.am
index bb2aac5..503a176 100644
--- a/lib/netstd/Makefile.am
+++ b/lib/netstd/Makefile.am
@@ -20,7 +20,7 @@
 SUBDIRS = . 
 
 all-local:
-	$(DOTNETCORE) build
+	$(DOTNETCORE) build -c Release
 
 check-local:
 	$(DOTNETCORE) test Tests/Thrift.Tests/Thrift.Tests.csproj