diff --git a/src/Symfony/Component/Console/Helper/ProgressBar.php b/src/Symfony/Component/Console/Helper/ProgressBar.php
index 7c0c09a97d..c2c6474e4e 100644
--- a/src/Symfony/Component/Console/Helper/ProgressBar.php
+++ b/src/Symfony/Component/Console/Helper/ProgressBar.php
@@ -295,6 +295,13 @@ final class ProgressBar
         }
     }
 
+    public function setMaxSteps(int $max)
+    {
+        $this->format = null;
+        $this->max = max(0, $max);
+        $this->stepWidth = $this->max ? Helper::strlen((string) $this->max) : 4;
+    }
+
     /**
      * Finishes the progress output.
      */
@@ -362,12 +369,6 @@ final class ProgressBar
         $this->formatLineCount = substr_count($this->format, "\n");
     }
 
-    private function setMaxSteps(int $max)
-    {
-        $this->max = max(0, $max);
-        $this->stepWidth = $this->max ? Helper::strlen((string) $this->max) : 4;
-    }
-
     /**
      * Overwrites a previous message to the output.
      */
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
index aca64914a9..09e7c1a94c 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
@@ -592,6 +592,29 @@ class ProgressBarTest extends TestCase
         );
     }
 
+    public function testSettingMaxStepsDuringProgressing()
+    {
+        $output = $this->getOutputStream();
+        $bar = new ProgressBar($output);
+        $bar->start();
+        $bar->setProgress(2);
+        $bar->setMaxSteps(10);
+        $bar->setProgress(5);
+        $bar->setMaxSteps(100);
+        $bar->setProgress(10);
+        $bar->finish();
+
+        rewind($output->getStream());
+        $this->assertEquals(
+            rtrim('    0 [>---------------------------]').
+            rtrim($this->generateOutput('    2 [-->-------------------------]')).
+            rtrim($this->generateOutput('  5/10 [==============>-------------]  50%')).
+            rtrim($this->generateOutput('  10/100 [==>-------------------------]  10%')).
+            rtrim($this->generateOutput(' 100/100 [============================] 100%')),
+            stream_get_contents($output->getStream())
+        );
+    }
+
     public function testWithSmallScreen()
     {
         $output = $this->getOutputStream();