diff --git a/Michelf/Markdown.php b/Michelf/Markdown.php
index 4d1dd4df..c8ced899 100644
--- a/Michelf/Markdown.php
+++ b/Michelf/Markdown.php
@@ -1705,7 +1705,7 @@ protected function doExtraAttributes($tag_name, $attr) {
 			} else if ($element{0} == '#') {
 				if ($id === false) $id = substr($element, 1);
 			} else if (strpos($element, '=') > 0) {
-				$parts = explode('=', $element);
+				$parts = explode('=', $element, 2);
 				$attributes[] = $parts[0] . '="' . $parts[1] . '"';
 			}
 		}