diff --git a/src/ooxml/java/org/apache/poi/openxml4j/util/ZipInputStreamZipEntrySource.java b/src/ooxml/java/org/apache/poi/openxml4j/util/ZipInputStreamZipEntrySource.java
index e185239ff..0a56966d4 100644
--- a/src/ooxml/java/org/apache/poi/openxml4j/util/ZipInputStreamZipEntrySource.java
+++ b/src/ooxml/java/org/apache/poi/openxml4j/util/ZipInputStreamZipEntrySource.java
@@ -38,7 +38,7 @@ public class ZipInputStreamZipEntrySource implements ZipEntrySource {
 	
 	/**
 	 * Reads all the entries from the ZipInputStream 
-	 *  into memory, and closes the source stream.
+	 *  into memory, and don't close (since POI 4.0.1) the source stream.
 	 * We'll then eat lots of memory, but be able to
 	 *  work with the entries at-will.
 	 */
@@ -50,7 +50,6 @@ public class ZipInputStreamZipEntrySource implements ZipEntrySource {
 			}
 			zipEntries.put(zipEntry.getName(), new ZipArchiveFakeEntry(zipEntry, inp));
 		}
-		inp.close();
 	}
 
 	@Override