diff --git a/History.md b/History.md
index 936b0116c6..065e4cd5fa 100644
--- a/History.md
+++ b/History.md
@@ -7,6 +7,7 @@
 * Bugfixes
   * Fix Errno::EINVAL when SSL is enabled and browser rejects cert (#1564)
   * Fix pumactl defaulting puma to development if an environment was not specified (#2035)
+  * Fix closing file stream when reading pid from pidfile (#2048)
 
 ## 4.2.1 / 2019-10-07
 
diff --git a/lib/puma/control_cli.rb b/lib/puma/control_cli.rb
index 8eee72f5d3..6bad828b88 100644
--- a/lib/puma/control_cli.rb
+++ b/lib/puma/control_cli.rb
@@ -132,7 +132,7 @@ def prepare_configuration
         @pid = sf.pid
       elsif @pidfile
         # get pid from pid_file
-        @pid = File.open(@pidfile).gets.to_i
+        File.open(@pidfile) { |f| @pid = f.read.to_i }
       end
     end