diff --git a/go b/go
index e1b1dede11245..9a9110513e07b 100755
--- a/go
+++ b/go
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-java -jar third_party/jruby/jruby-complete.jar -S rake $*
+java -jar third_party/jruby/jruby-complete.jar --1.9 -S rake $*
diff --git a/go.bat b/go.bat
index 60d29ee9221d2..6837ee6cd4af7 100755
--- a/go.bat
+++ b/go.bat
@@ -1,2 +1,2 @@
 @echo off
-java -jar third_party\jruby\jruby-complete.jar -S rake %*
+java -jar third_party\jruby\jruby-complete.jar --1.9 -S rake %*