diff --git a/question/type/ddwtos/db/install.xml b/question/type/ddwtos/db/install.xml
index 50dbefe8a09..9d2888e09e9 100755
--- a/question/type/ddwtos/db/install.xml
+++ b/question/type/ddwtos/db/install.xml
@@ -19,7 +19,7 @@
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="questionid"/>
-        <KEY NAME="questionid" TYPE="foreign" FIELDS="questionid" REFTABLE="questions" REFFIELDS="id" PREVIOUS="primary"/>
+        <KEY NAME="questionid" TYPE="foreign" FIELDS="questionid" REFTABLE="question" REFFIELDS="id" PREVIOUS="primary"/>
       </KEYS>
     </TABLE>
   </TABLES>