diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 99870f3..07b2fb4 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -3288,8 +3288,10 @@ function drupal_check_memory_limit($required, $memory_limit = NULL) {
   if (!isset($memory_limit)) {
     $memory_limit = ini_get('memory_limit');
   }
-  if ($memory_limit && $memory_limit != -1 && parse_size($memory_limit) < parse_size($required)) {
-    return FALSE;
-  }
-  return TRUE;
+
+  // There is sufficient memory if:
+  // - No memory limit is set.
+  // - The memory limit is set to unlimited (-1).
+  // - The memory limit is greater than the memory required for the operation.
+  return ((!$memory_limit) || ($memory_limit == -1) || (parse_size($memory_limit) > parse_size($required)));
 }