diff --git a/vars/build.vars b/vars/build.vars
index 27601c5..0cd992b 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -796,7 +796,7 @@ if [ -n "$(which ruby 2>/dev/null)" ]; then
 	: ${PKG_RUBY_SHA256SUM:=ba5ba60e5f1aa21b4ef8e9bf35b9ddb57286cb546aac4b5a28c71f459467e507};
 	: ${PKG_RUBY_VERSION:=2.3.0};
 	: ${PKG_RUBY_URL:=https://cache.ruby-lang.org/pub/ruby/${PKG_RUBY_VERSION%.*}/ruby-${PKG_RUBY_VERSION}.tar.gz};
-	: ${PKG_RUBY_CONFIGURE_ARGS_EXTRA:=--with-out-ext=fiddle};
+	: ${PKG_RUBY_CONFIGURE_ARGS_EXTRA:="--disable-install-rdoc --with-out-ext=fiddle"};
 	: ${PKG_RUBY_MAKEFLAGS_BUILD:=-j1};
 fi;
 : ${PKG_RXVT_UNICODE_SHA256SUM:=e94628e9bcfa0adb1115d83649f898d6edb4baced44f5d5b769c2eeb8b95addd};