diff --git a/src/WikiTexVC/Nodes/Lr.php b/src/WikiTexVC/Nodes/Lr.php
index 228066457..89249d63d 100644
--- a/src/WikiTexVC/Nodes/Lr.php
+++ b/src/WikiTexVC/Nodes/Lr.php
@@ -74,7 +74,8 @@ class Lr extends TexNode {
 			$moRight = new MMLmo( TexClass::CLOSE, $rightAttrs );
 			$right = $moRight->encapsulateRaw( $this->right );
 		}
-
+		// Don't apply outer ' inside the LR structure
+		unset( $state['deriv'] );
 		$inner = $this->getArg()->renderMML( [], $state );
 		$mrow = new MMLmrow( TexClass::INNER );
 		return $mrow->encapsulateRaw(
diff --git a/tests/phpunit/unit/WikiTexVC/Nodes/LrTest.php b/tests/phpunit/unit/WikiTexVC/Nodes/LrTest.php
index c36e0e165..d621373e1 100644
--- a/tests/phpunit/unit/WikiTexVC/Nodes/LrTest.php
+++ b/tests/phpunit/unit/WikiTexVC/Nodes/LrTest.php
@@ -56,4 +56,17 @@ class LrTest extends MediaWikiUnitTestCase {
 			'Should extract identifiers' );
 	}
 
+	public function testRenderA() {
+		$n = new Lr( '(', ')', new TexArray( new Literal( 'A' ) ) );
+		$mml = $n->renderMML();
+		$this->assertStringContainsString( 'A</mi>', $mml );
+		$this->assertStringContainsString( ')</mo>', $mml );
+	}
+
+	public function testRenderADeriv() {
+		$n = new Lr( '(', ')', new TexArray( new Literal( 'A' ) ) );
+		$mml = $n->renderMML( [], [ 'deriv' => 1 ] );
+		$this->assertStringNotContainsString( '&#x2032;</mo>', $mml );
+	}
+
 }
diff --git a/tests/phpunit/unit/WikiTexVC/Nodes/TexArrayTest.php b/tests/phpunit/unit/WikiTexVC/Nodes/TexArrayTest.php
index ab1e3cba4..76d1453db 100644
--- a/tests/phpunit/unit/WikiTexVC/Nodes/TexArrayTest.php
+++ b/tests/phpunit/unit/WikiTexVC/Nodes/TexArrayTest.php
@@ -151,4 +151,9 @@ class TexArrayTest extends MediaWikiUnitTestCase {
 		$this->assertEquals( $custom, $res[0] );
 	}
 
+	public function testRenderADeriv() {
+		$n = new TexArray( new Literal( 'A' ) );
+		$mml = $n->renderMML( [], [ 'deriv' => 1 ] );
+		$this->assertStringContainsString( '&#x2032;</mo>', $mml );
+	}
 }