1 files changed, 1 insertions, 1 deletions
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
index 1ddc55d98a..b5c926967e 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java
@@ -286,7 +286,7 @@ public class XWPFDocument extends POIXMLDocument implements Document, IBody {
                         }
                     }
                 } catch (ClassCastException e) {
-                    throw new IllegalArgumentException("Relation and type of document-part did not match, had relation " + relation + " and type of document-part: " + p.getClass());
+                    throw new IllegalArgumentException("Relation and type of document-part did not match, had relation " + relation + " and type of document-part: " + p.getClass(), e);
                 }
             }
             initHyperlinks();