diff --git a/lib/puma/request.rb b/lib/puma/request.rb
index 19f8c7dd..69dddfd6 100644
--- a/lib/puma/request.rb
+++ b/lib/puma/request.rb
@@ -165,8 +165,7 @@ def prepare_response(status, headers, res_body, requests, client)
       # This allows Puma to service connections fairly when the number
       # of concurrent connections exceeds the size of the threadpool.
       force_keep_alive = if @enable_keep_alives
-        client.requests_served < @max_fast_inline ||
-        @thread_pool.busy_threads < @max_threads
+        client.requests_served < @max_keep_alive
       else
         # Always set force_keep_alive to false if the server has keep-alives not enabled.
         false
@@ -580,7 +579,7 @@ def fetch_status_code(status)
     #   response body
     # @param io_buffer [Puma::IOBuffer] modified inn place
     # @param force_keep_alive [Boolean] 'anded' with keep_alive, based on system
-    #   status and `@max_fast_inline`
+    #   status and `@max_keep_alive`
     # @return [Hash] resp_info
     # @version 5.0.3
     #
diff --git a/lib/puma/server.rb b/lib/puma/server.rb
index 5f796039..6bed9d0f 100644
--- a/lib/puma/server.rb
+++ b/lib/puma/server.rb
@@ -95,7 +95,7 @@ def initialize(app, events = nil, options = {})
       @min_threads               = @options[:min_threads]
       @max_threads               = @options[:max_threads]
       @queue_requests            = @options[:queue_requests]
-      @max_fast_inline           = @options[:max_fast_inline]
+      @max_keep_alive            = @options[:max_fast_inline] 
       @enable_keep_alives        = @options[:enable_keep_alives]
       @enable_keep_alives      &&= @queue_requests
       @io_selector_backend       = @options[:io_selector_backend]