diff --git a/.gitignore b/.gitignore
index 4478ece..9d7e419 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 .settings/
 coverage/
 .DS_Store
+*.pot
+
diff --git a/classes/ComicPressStoryline.inc b/classes/ComicPressStoryline.inc
index 77d46a5..b92337a 100644
--- a/classes/ComicPressStoryline.inc
+++ b/classes/ComicPressStoryline.inc
@@ -430,15 +430,17 @@ class ComicPressStoryline {
 	    $children = array($parent);
 	    do {
 	      $found_children = false;
-	      foreach ($this->_structure as $category_id => $info) {
-	        if (!in_array($category_id, $children)) {
-	        	if (isset($info['parent'])) {
-		          if (in_array($info['parent'], $children)) {
-		            $children[] = $category_id;
-		            $found_children = true;
-		          }
-	        	}
-	        }
+	      if (is_array($this->_structure)) {
+		      foreach ($this->_structure as $category_id => $info) {
+		        if (!in_array($category_id, $children)) {
+		        	if (isset($info['parent'])) {
+			          if (in_array($info['parent'], $children)) {
+			            $children[] = $category_id;
+			            $found_children = true;
+			          }
+		        	}
+		        }
+		      }
 	      }
 	    // @codeCoverageIgnoreStart
 	    } while ($found_children);
diff --git a/test/ComicPressStorylineTest.php b/test/ComicPressStorylineTest.php
index f99ec1a..555d2ff 100644
--- a/test/ComicPressStorylineTest.php
+++ b/test/ComicPressStorylineTest.php
@@ -384,6 +384,11 @@ class ComicPressStorylineTest extends PHPUnit_Framework_TestCase {
     $this->assertEquals(array(2,3,4), $this->css->_find_children($search));
   }
 
+  function testFindChildrenEmptyStructure() {
+  	$this->css->_structure = false;
+  	$this->assertEquals(array(2), $this->css->_find_children(2));
+  }
+
   function testFindLevelOrAbove() {
     $this->css->_structure = array(
       '1' => array('next' => 2, 'level' => 1),