diff --git a/jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartInputStream.java b/jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartInputStream.java
index d4d2239..1807bdd 100644
--- a/jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartInputStream.java
+++ b/jetty-util/src/main/java/org/eclipse/jetty/util/MultiPartInputStream.java
@@ -589,6 +589,8 @@
                 part.close();
             }
         }
+        if (!lastPart)
+            throw new IOException("Incomplete parts");
     }