diff --git a/man/bundle-config.ronn b/man/bundle-config.ronn
index 7f8ae9face9..35a400bdeb2 100644
--- a/man/bundle-config.ronn
+++ b/man/bundle-config.ronn
@@ -167,7 +167,7 @@ learn more about their operation in [bundle install(1)][bundle-install(1)].
    instead of warnings.
    Use `bundle config --delete disable_multisource` to unset.
 * `disable_platform_warnings` (`BUNDLE_DISABLE_PLATFORM_WARNINGS`):
-   Whether Bundler should show platform warnings.
+   Disable warnings during bundle install when a dependency is unused on the current platform.
 * `disable_shared_gems` (`BUNDLE_DISABLE_SHARED_GEMS`):
    Stop Bundler from accessing gems installed to RubyGems' normal location.
 * `disable_version_check` (`BUNDLE_DISABLE_VERSION_CHECK`):