diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
index 72e61881ce..f02b9b7422 100644
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
@@ -114,7 +114,7 @@ final class PhutilRemarkupTableBlockRule extends PhutilRemarkupBlockRule {
         if ($cell->isContentNode()) {
           $content = $node->getContent();
 
-          if (!strlen(trim($content))) {
+          if ($content === null || trim($content) === '') {
             continue;
           }