diff --git a/ruby/red-arrow/ext/arrow/extconf.rb b/ruby/red-arrow/ext/arrow/extconf.rb
index b4cf76a09c8..1ec96d95b3e 100644
--- a/ruby/red-arrow/ext/arrow/extconf.rb
+++ b/ruby/red-arrow/ext/arrow/extconf.rb
@@ -50,7 +50,7 @@
                               Arrow::Version::MAJOR,
                               Arrow::Version::MINOR,
                               Arrow::Version::MICRO)
-  verison = [
+  version = [
     Arrow::Version::MAJOR,
     Arrow::Version::MINOR,
     Arrow::Version::MICRO,