diff --git a/lib/runner.php b/lib/runner.php
index 1794fae..459fc34 100644
--- a/lib/runner.php
+++ b/lib/runner.php
@@ -4,6 +4,7 @@
 
 use phpDocumentor\Reflection\BaseReflector;
 use phpDocumentor\Reflection\ClassReflector;
+use phpDocumentor\Reflection\ClassReflector\ConstantReflector;
 use phpDocumentor\Reflection\ClassReflector\MethodReflector;
 use phpDocumentor\Reflection\ClassReflector\PropertyReflector;
 use phpDocumentor\Reflection\FunctionReflector;
@@ -91,6 +92,7 @@ function parse_files( $files, $root ) {
 					'name'  => $constant->getShortName(),
 					'line'  => $constant->getLineNumber(),
 					'value' => $constant->getValue(),
+					'doc'   => export_docblock( $constant, $file_setup_blueprints, $path ),
 				);
 			}
 
@@ -134,6 +136,7 @@ function parse_files( $files, $root ) {
 					'abstract'   => $class->isAbstract(),
 					'extends'    => $class->getParentClass(),
 					'implements' => $class->getInterfaces(),
+					'constants'  => export_constants( $class->getConstants(), $class_setup_blueprints, $path ),
 					'properties' => export_properties( $class->getProperties(), $class_setup_blueprints, $path ),
 					'methods'    => export_methods( $class->getMethods(), $class_setup_blueprints, $path ),
 					'doc'        => $class_doc,
@@ -705,6 +708,29 @@ function export_arguments( array $arguments ) {
 	return $output;
 }
 
+/**
+ * @param ConstantReflector[] $constants
+ * @param array               $inherited_setup_blueprints Optional. Setup Blueprints inherited from the file or class DocBlock.
+ * @param string              $source_file                Optional. Source path used in invalid snippet metadata errors.
+ *
+ * @return array
+ */
+function export_constants( array $constants, array $inherited_setup_blueprints = array(), $source_file = '' ) {
+	$out = array();
+
+	foreach ( $constants as $constant ) {
+		$out[] = array(
+			'name'     => $constant->getShortName(),
+			'line'     => $constant->getLineNumber(),
+			'end_line' => $constant->getNode()->getAttribute( 'endLine' ),
+			'value'    => $constant->getValue(),
+			'doc'      => export_docblock( $constant, $inherited_setup_blueprints, $source_file ),
+		);
+	}
+
+	return $out;
+}
+
 /**
  * @param PropertyReflector[] $properties
  * @param array               $inherited_setup_blueprints Optional. Setup Blueprints inherited from the file or class DocBlock.
diff --git a/tests/phpunit/tests/export/constants.inc b/tests/phpunit/tests/export/constants.inc
new file mode 100644
index 0000000..ba680ec
--- /dev/null
+++ b/tests/phpunit/tests/export/constants.inc
@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * A constant defined with define().
+ */
+define( 'TEST_DEFINED_CONSTANT', 1 );
+
+/**
+ * A constant declared with const.
+ */
+const TEST_CONST_CONSTANT = 'value';
+
+class Test_Constants_Class {
+
+	/**
+	 * A class constant.
+	 */
+	const TEST_CLASS_CONSTANT = 2;
+}
diff --git a/tests/phpunit/tests/export/constants.php b/tests/phpunit/tests/export/constants.php
new file mode 100644
index 0000000..6d0d8ad
--- /dev/null
+++ b/tests/phpunit/tests/export/constants.php
@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * A test case for exporting constants.
+ */
+
+namespace WP_Parser\Tests;
+
+/**
+ * Test that constants are exported correctly.
+ */
+class Export_Constants extends Export_UnitTestCase {
+
+	/**
+	 * Test that file constant docblocks are exported.
+	 */
+	public function test_file_constant_docblocks() {
+
+		$this->assertEntityHasDocs(
+			$this->find_entity_data_in( $this->export_data, 'constants', 'TEST_DEFINED_CONSTANT' )
+			, array( 'description' => 'A constant defined with define().' )
+		);
+
+		$this->assertEntityHasDocs(
+			$this->find_entity_data_in( $this->export_data, 'constants', 'TEST_CONST_CONSTANT' )
+			, array( 'description' => 'A constant declared with const.' )
+		);
+	}
+
+	/**
+	 * Test that class constants are exported.
+	 */
+	public function test_class_constants() {
+
+		$class = $this->find_entity_data_in( $this->export_data, 'classes', 'Test_Constants_Class' );
+
+		$this->assertEntityContains(
+			$class
+			, 'constants'
+			, array(
+				'name'            => 'TEST_CLASS_CONSTANT',
+				'line'            => 18,
+				'end_line'        => 18,
+				'value'           => '2',
+				'doc.description' => 'A class constant.',
+			)
+		);
+	}
+}