diff --git a/config/initializers/8_metrics.rb b/config/initializers/8_metrics.rb
index 5e34aac65275dacc6e79272e961382bba33e74e6..c80d28746d62c5bdb4e0b62c6a4603046752c0c0 100644
--- a/config/initializers/8_metrics.rb
+++ b/config/initializers/8_metrics.rb
@@ -174,6 +174,10 @@ if Gitlab::Metrics.enabled?
           loc && loc[0].start_with?(models) && method.source =~ regex
         end
       end
+
+    # Ability is in app/models, is not an ActiveRecord model, but should still
+    # be instrumented.
+    Gitlab::Metrics::Instrumentation.instrument_methods(Ability)
   end
 
   Gitlab::Metrics::Instrumentation.configure do |config|