diff --git a/src/Symfony/Component/Console/Input/ArgvInput.php b/src/Symfony/Component/Console/Input/ArgvInput.php
index da064598d0..62c658b4f9 100644
--- a/src/Symfony/Component/Console/Input/ArgvInput.php
+++ b/src/Symfony/Component/Console/Input/ArgvInput.php
@@ -283,7 +283,7 @@ class ArgvInput extends Input
                 //   For long options, test for '--option=' at beginning
                 //   For short options, test for '-o' at beginning
                 $leading = 0 === strpos($value, '--') ? $value.'=' : $value;
-                if ($token === $value || 0 === strpos($token, $leading)) {
+                if ($token === $value || '' !== $leading && 0 === strpos($token, $leading)) {
                     return true;
                 }
             }
@@ -311,7 +311,7 @@ class ArgvInput extends Input
                 //   For long options, test for '--option=' at beginning
                 //   For short options, test for '-o' at beginning
                 $leading = 0 === strpos($value, '--') ? $value.'=' : $value;
-                if (0 === strpos($token, $leading)) {
+                if ('' !== $leading && 0 === strpos($token, $leading)) {
                     return substr($token, strlen($leading));
                 }
             }
diff --git a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
index 04f5ce3157..c2a277a93f 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
@@ -337,6 +337,21 @@ class ArgvInputTest extends TestCase
         $this->assertFalse($input->hasParameterOption('-fh'), '->hasParameterOption() returns true if the given short option is in the raw input');
     }
 
+    public function testNoWarningOnInvalidParameterOption()
+    {
+        $input = new ArgvInput(array('cli.php', '-edev'));
+
+        // Control.
+        $this->assertTrue($input->hasParameterOption(array('-e', '')));
+        // No warning is thrown if https://github.com/symfony/symfony/pull/26156 is fixed
+        $this->assertFalse($input->hasParameterOption(array('-m', '')));
+
+        // Control.
+        $this->assertEquals('dev', $input->getParameterOption(array('-e', '')));
+        // No warning is thrown if https://github.com/symfony/symfony/pull/26156 is fixed
+        $this->assertFalse($input->getParameterOption(array('-m', '')));
+    }
+
     public function testToString()
     {
         $input = new ArgvInput(array('cli.php', '-f', 'foo'));