diff --git a/metacall.rb b/metacall.rb
index 2888323..bd1121c 100644
--- a/metacall.rb
+++ b/metacall.rb
@@ -60,7 +60,7 @@ def install
       -DOPTION_BUILD_LOADERS_C=OFF
       -DOPTION_BUILD_LOADERS_COB=OFF
       -DOPTION_BUILD_LOADERS_CS=OFF
-      -DOPTION_BUILD_LOADERS_RB=OFF
+      -DOPTION_BUILD_LOADERS_RB=ON
       -DOPTION_BUILD_LOADERS_TS=OFF
       -DOPTION_BUILD_LOADERS_FILE=OFF
       -DOPTION_BUILD_PORTS=ON