diff --git a/includes/Request/WebRequest.php b/includes/Request/WebRequest.php
index 734076449b8..feb22155dd3 100644
--- a/includes/Request/WebRequest.php
+++ b/includes/Request/WebRequest.php
@@ -668,8 +668,12 @@ class WebRequest {
 	 * @return bool
 	 */
 	public function getFuzzyBool( $name, $default = false ): bool {
-		return $this->getBool( $name, $default )
-			&& strcasecmp( $this->getRawVal( $name ), 'false' ) !== 0;
+		$value = $this->getRawVal( $name );
+		if ( $value === null ) {
+			return (bool)$default;
+		}
+
+		return $value && strcasecmp( $value, 'false' ) !== 0;
 	}
 
 	/**
diff --git a/tests/phpunit/includes/Request/WebRequestTest.php b/tests/phpunit/includes/Request/WebRequestTest.php
index f6f63c97fa2..386bed6b4b5 100644
--- a/tests/phpunit/includes/Request/WebRequestTest.php
+++ b/tests/phpunit/includes/Request/WebRequestTest.php
@@ -297,6 +297,11 @@ class WebRequestTest extends MediaWikiIntegrationTestCase {
 		$this->assertFalse( $req->getFuzzyBool( 'z' ), 'Not found' );
 	}
 
+	public function testGetFuzzyBoolDefaultTrue() {
+		$req = $this->mockWebRequest();
+		$this->assertTrue( $req->getFuzzyBool( 'z', true ), 'Not found, default true' );
+	}
+
 	public function testGetCheck() {
 		$req = $this->mockWebRequest( [ 'x' => 'Value', 'zero' => '0' ] );
 		$this->assertFalse( $req->getCheck( 'z' ), 'Not found' );