diff --git a/bin/ruby-build b/bin/ruby-build
index 67ac6db7..b27f6864 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -129,7 +129,7 @@ make_package() {
 
 fetch_url() {
   if type curl &>/dev/null; then
-    curl "$@"
+    curl -f "$@"
   elif type wget &>/dev/null; then
     wget -O- "$@"
   else