diff --git a/lib/Doctrine/ORM/Tools/SchemaTool.php b/lib/Doctrine/ORM/Tools/SchemaTool.php
index 82b3a1dbf..33572ba9b 100644
--- a/lib/Doctrine/ORM/Tools/SchemaTool.php
+++ b/lib/Doctrine/ORM/Tools/SchemaTool.php
@@ -546,7 +546,7 @@ class SchemaTool
         $orderedTables = array();
 
         foreach ($classes AS $class) {
-            if ($class->isIdGeneratorSequence() && $class->name == $class->rootEntityName && $this->_platform->supportsSequences()) {
+            if ($class->isIdGeneratorSequence() && !$class->isMappedSuperclass && $class->name == $class->rootEntityName && $this->_platform->supportsSequences()) {
                 $sql[] = $this->_platform->getDropSequenceSQL($class->sequenceGeneratorDefinition['sequenceName']);
             }
         }